As a particularly important move for Linux gamers and enthusiasts where you may be riding frequent Git builds of new Mesa graphics drivers or even the bi-weekly point releases – compared to the multi-week/monthly update regiment for Windows graphics drivers – Valve’s Steam client will now flush its stale shader cache upon GPU/driver changes. This is important for conserving disk space especially where storage constraints are possible like with the Steam Deck…

Source: Phoronix – Steam Will Now Flush Its Stale Shader Cache To Help Save Space