It does not look like Dead Space is getting any more patches. However in my recent (last month) experience it was very much playable from start to finish with very good performance on my PC (i9 10850K / RTX 3080). I guess your mileage may vary.
I do not know about Jedi Survivor yet, because I am waiting for it to come to EA Play. Last patch was in October so it looks like it is still maintained. Recent Steam reviews do still mention technical issues though.