Comment by belthesar

There's a joke that "the most stable Linux ABI is Win32". Like sibling commenters have pointed out, many Linux game ports either used system libraries that may or may not be compatible after years of changes, or bring along vendored libraries that may not play well. Valve tried to encourage Linux builds for games during their first foray into Linux gaming with the Steam Runtime, but even they have largely abandoned updating it in lieu of advancing WINE and sibling systems like DXVK, vkd3d-proton, dgvoodoo2, et al. Much more engineering effort goes into the Windows game tech stack than native Linux ones have.

For older games, the biggest advantage WINE has over Windows is WINE's prefix model, which lets you essentially build purpose built environments, not dissimilar to vendoring your dependencies into an OCI container. And if you're running a file system with CoW powers, those separate environments don't even take up a great deal of storage since the vast majority of the prefix is bit for bit identical.