How do your game handle powercreepts?

My standard of "fair" powercreept is that while it exist it should not punish the players too much or force you to get shiniest new units to keep up or clear basic contents.

Arknights: they handled it well. While obvious powercreept exists, a lot of OG 6 stars still have place in the meta or at least very strong unit. Even when new units that are better than them are released, the OG units are still extremely good and usable. Gameplay content can be cleared with low rarity units. The game has a lot of leeway for you to use niche and non metas, creative solutions, etc.

Onmyouji: very exhausting powercreept and character progressions. A lot of earlier ssr are basically unusable. Not to mention PvP is big part of the gameplay. Stopped playing because it is hard to get new units or build characters to optimum.

JJK phantom parade. Not much to comment because the game is only about 1 year old. I would say I like how they constantly buff old units to keep up with newer ones. No pvp. Game lacks content and very casual. You do not need to have the most meta units to clear events (the most meta units are mainly used to clear the highest level event formidable event stage that give minimum rewards like just a cosmetic title or 1/10 pull lol). It is a shitty gacha game which is hardcarried by the IP. But I gotta say the good point. I think, as the game gets older powercreept will be more prevalent unless there are new game modes to encourage more strategy creativity. Currently the whole gameplay are just boring stat sticks. Most people use the exact same boring strategy of buffing an OP DPS to nuke. If nothing is being changed, the dev would simply bloat the enemy stats making old units non viable.