Search, Gmail, Maps, Chrome and Android are probably safe. Everything else can be killed at any point in tine.
Like I said, Google's never killing of Keep.
A lot of these changes came with Pichai, his ethos for google seems to be to turn it into another Microsoft; Microsoft is fine, but we already have one of those. It was better when we also had a google that was true to its founding ideology... everything went downhill since that g became uppercase.
I think we can all agree on search.
Maps, Android, Chrome & YouTube would be very unlikely. Adsense too but maybe if they needed to avoid anti-trust .
Docs, drive and Gmail, probably not but I wouldn't say never.
The rest, Id say could go on the right whim of cost cutting.