Using yarn >= 2 offline cache, yay or nay?

[berghall]

With the newer yarn versions, yarn automatically generates a .yarn/cache directory which is supposed to be a local cache instead of the global cache which is in yarn 1.
Should this be added to the .gitignore or be committed to the repo?
The actual issue here is that the cached packages are bloating the changed files.

Also should the yarn version be enforced, because the diff between a v1 and a v3 yarn.lock are significant. It doesn't cause any problems, but it could maybe be better to use one version on the same major version to avoid any nasty issues.