Based on the below comment, I think you can keep some services like youtube and photos. That said, I strongly recommend every do regular google takeouts https://takeout.google.com/settings/takeout?pli=1
https://old.reddit.com/r/DataHoarder/comments/s7v4my/google_...
Do you have any source on this? It doesn't sound right to me. I'm talking about the base free services that Google offers to everyone, not about G Suite. Over a billion people are using free Gmail, I think it would have been bigger news if Google had pulled the plug.
I'm glad I moved from Gmail to Fastmail a month ago. After they screwed me over with Google Sites V2, I just don't trust them with my email address. It's tied to too many things, and if something ever went wrong, I'd be completely screwed and could not get any help from Google. I clicked their "Report a problem" button when trying to migrate to Sites V2, to report several big issues. I'll let you guess how many responses I got.
So if you had 5 users using it, you now have to pay for those seats.
Regarding workspace, there's different plans/tiers. Here's a list of them, https://workspace.google.com/pricing.html
On all of them you keep gmail, docs, sheets, drive. But now if you had 5 users, you are paying 5 x $6 x 12 months = $360/year