Regarding the number of worksheets for the new site

Evening, Like many, I am somewhat doubtful of the new site's layout, but I am open to it and to give it a try since it looks more aesthetic. My only concern is that I currently pay for a 250-private worksheets, and I've seen there is no such option for the new site. What will happen to all of them then? I heavily rely on them for my work so I'm worried that with this transition I won't be able to have that many or that I will lose the ones I have. I was even thinking about expanding to the 500-worksheet subscription, but I think it will also stop existing. I'd appreciate a response, thanks!