MightySheep wrote:at least with magic once youve got a card, youve got it for good and its part of your expanding collection (i assume, never really got into it)
hearthstone does a thing where every couple of expansions, it wipes the slate clean, except for a selection of "basic" cards, everything else becomes non-standard and you typically then turn it into dust which can be spent on creating new cards at 1/4th loss in value every time (or become a faggy "wild" mode player)
It's sort of similar in Magic. There are various 'formats' which dictate which cards can be played. The major competitive formats are:
* Standard is by far the most popular format, but only cards from roughly the past two years can be played. Every now and then (I think once a year nowadays?) the oldest sets in Standard 'rotate out' and are no longer allowed to be played in the format.
* Modern allows all cards printed since summer 2003 except for cards printed in specific supplemental non-standard sets. Cards never rotate out. More popular than Legacy and Vintage, but less popular than Standard.
* Legacy and Vintage both allow all legal cards ever printed, but Legacy has a somewhat sane banlist while Vintage is Magic at its most broken.
In all cases, certain specific cards are banned, and if a card is reprinted, you're allowed to use the older version of the card in formats where the reprint is legal (e.g. Standard currently contains some cards first printed in 2003's
Scourge set, so you can use the
Scourge versions of those cards in Standard as well).
There's also various forms of casual play, many of which allow you to use all cards (often with a banlist for the most broken ones).
Magic is a TCG and so you can trade away or sell the cards if you can no longer play them in Standard, but you still lose value if you're a Standard player.
However, this is a necessary evil for two reasons. The first is pretty self-evident if you compare the prices for competitive decks in Standard, Modern and Legacy. A competitive Standard deck costs $200-$400 when buying the cards from professional resellers. Competitive Modern costs $600-$1500 depending on the deck, and competitive Legacy is somewhere between $1200 and $6600. As the card pool grows, more powerful combinations of cards become possible and demand for older obscure cards with very specific effects grows; in addition, if design mistakes from the past do not rotate out and are also not blatant enough to be banned, prices of those cards also rise like mad. (It shouldn't need to be said that a cheap Standard deck wouldn't stand a chance in a format with so many powerful combinations and cards.) The longer a non-rotating format exists, the more expensive it will become. Attempts to contain this, such as by reprinting cards that never should have been made in regular sets, would harm the game balance and with that the health of the game. The very fact that your cards become unplayable over time in Standard is the reason Standard is playable in the first place.
The other reason is commercial incentive. Creation of a TCG/CCG is a business and to make a profit, players need to keep buying new cards. If there are many old cards you can use and newly printed cards aren't really any more useful than the older cards, players don't have much of a reason to buy the new cards. Natural corporate processes then lead to a situation where the developer starts making cards more and more powerful to incentivize players to buy them (as in that case they have a benefit over the older cards). Other TCGs have fallen into this trap before, and history shows it's extremely harmful to the health of the game. Rotation provides an alternative to this: If older cards keep rotating out, new cards become exciting again if they do something the current card pool cannot, even if older cards - that have already rotated out - were able to do the same thing or were perhaps even better than the new cards. This reduces the need for power creep, protecting the balance of the game.