I would prefer to see a notice of ownership change for plugins. My clients may not care about it, but for me to offer the best experience for them, more info is always better.

Most of my clients are rural small business owners with limited budgets, so for some things I find them the best free options.

As an example, recently there was a popular analytics plugin that changed ownership. The new ownership decided to switch many of the popular free features to premium. It took me a bit to realize this. I have now switched them to the new Google Site Kit.

I have experienced other ownership changes over the years as well. So I think having a notification pushed out just helps site owners and admins to be as informed as possible, so we can adapt quickly to any changes or privacy notification requirements.