My husband and I have been using Airbnb's a lot in the last couple of years and we love being part of a home rather than just staying in some impersonal hotel.
However a couple of people I know have both said "nothing less than 5* would do for them! In fact all the homes we have been in are at least 5* with the added knowledge that we are paying less and we get to hear about where the "secret" places are
Forgetting where you left your keys dies not mean you are “losing it”