I deleted nur Facebook Account sometime ago. I cleanly left all groups, “unfriended” all accounts (most of those were inactive anyways) and removed all my comments and media from over a decade.
I don’t think I lost anything.
My timeline was full of advertising or bot post or mirrored content already available on other platforms. The only real interactions were in the comments and ever there it was soulless.
That’s great about the Fediverse, the different bubbles are much smaller but much, mich more personal and connected.
Finally some dumb tracked advertising again!