Last year we have upgraded our Sitecore instance to version 9.3. We still have some renderings developed in ASP.Net Webforms (otherwise we are using ASP.Net MVC). Now we want to upgrade to Sitecore 10.2 and to gradually move all renderings to Client Side Renderings (CSR). My questions are:

 1. Does ASP.Net Webform at all work with Sitecore 10.2?   
 2. If yes then is there any limitations if I use ASP.Net Webforms with Sitecore 10.2?
 3. Is CSR possible with Sitecore 9.3?

Thanks