The skin market has definitely evolved a lot. I was in a similar position last year and decided to refresh my inventory. I found https://dmarket.com/trade-csgo-skins really useful for trading my outdated skins for more current ones. Some of those older operation skins actually hold surprising value to collectors, especially certain patterns or rare floats. I'd recommend checking current market prices before trading anything away. I bundled several of my average old skins to trade up for fewer but nicer new ones. The site makes it easy to see what your inventory is worth and what you can get for it. Just be strategic about what you keep versus what you trade - some of those older discontinued skins might continue appreciating