I have only encountered one or two players. I realise that the Steam version will be more popular and that MS player count will be higher once it hits Game Pass, but is the MS player count really that low? Even during what I expect to be peak times in the UK, eg. Friday nights and Saturday, The Mourningstar still seems to be quite quiet.
I have the MS Store version, but am still waiting for them to fix the bug preventing me from progressing past character creation. Also it was hard to even find the pre-order beta to download AND it seems to not be updated to be on par with the hotfix dropped for steam.