I think about 1 month after all restrictions are lifted things will resemble what we remember as normal. It will be some casualties but this happens all the time , virus or not .
Some guys will disappear and some new talent will show up, just like always.
Key word is 'all restrictions are lifted" as very few of us will be that horny as to risk quarantines on arrival in Thailand and again when returning home.
Everybody will be making their calculations , bar owners , landlords and guys but if demand will appear, offer will spring in it's wake overnight.