They are finally splitting up the Splash Brothers, in a last ditch effort to get pieces around Steph, and maybe try to win with Steph before his window officially closes. Or get picks to rebuild. Either way, the Warriors are breaking up their current core. I think the original report was from Shams. A quick search and there are multiple articles about this news. This is one of them.
https://www.sportsnet.ca/nba/article/report-warriors-preparing-to-lose-klay-thompson-in-free-agency/
According to Shams, the front running teams that will likely sign Klay are the Mavs, Lakers, and Clippers. Which team do you think will end up signing Klay? Which team is the best fit? Either way, this is definitely end of an era; well, maybe it will be end of an era when Klay actually gets traded.