Oh, yeah, Warframe does this a lot. Items that are introduced with a high crafting cost will gradually lower, items purchased for bespoke currencies will have that currency become a more common reward drop or offered as a drop in a new, easier mode, items available for excessive grind during a limited time will come back a year or two later with a much faster acquisition in a special event window. Almost everything eventually becomes much easier to get. There's a fair bit of power creep in weapons and mods in Warframe, too, so anything that isn't a prime version of a Warframe will also reduce in gameplay value over time and usually in general desirability as well. (Power creep doesn't normally affect frames themselves the same way because that's the game's character roster, so DE will periodically rework individual frames that have stopped being viable, and once a frame has a Prime version, there's no better replacement in the future, just upgrades that can be attached to it or spent on it, while its base abilities might get quietly boosted in an update.)
I don't mind it personally if I spent three times as long getting something but got it a year earlier, and it keeps old items in rotation so that things stick around as part of the game. But sometimes it's a bit nuts how big that original grind investment can be. Arcane enhancements for warframes, for instance, were once a category of items that dropped only from an hour-long, multi-phase boss fight that it was possible to just fail if you were too slow. You got three chances of a drop along the way, there were thirty possibilities, some were rarer than others, all the way up to arcanes that had one 6% chance to drop at the end of the whole fight, and you needed 10 of a particular arcane to upgrade it to full effectiveness. Since arcanes were tradeable, pretty much anyone who had these either specialized in farming them or bought them from players who did for fat stacks of premium currency.
You can still do all of that, and the fight is a lot easier now, but I got my arcanes when they introduced an event during which thirty minutes of play equated to another bespoke currency with which I could buy any arcane I wanted. (At this point they'd also raised the ceiling on the arcane upgrades, so instead of 10 copies, a fully ranked arcane was 21, with nearly twice the effect to match.)
