Edits overload kind 1s, creating conflicts in what people might see in different clients when viewing the "same" event. It's quite different from purely additive features.
Discussion
Deletions overwrite kind 1 too. Nobody cared for months. Some clients still don't.
Deletions are either effective (the note is gone), or additive (the note is "deleted"). They don't change anything in place. The effect of a successful delete is the same as not being able to find a note, which has to be handled in any case.
And for the record, I resisted deletes for years. I recently added them, because they do in fact appear to work pretty well. It was nostr:nprofile1qythwumn8ghj7un9d3shjtnwdaehgu3wvfskuep0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgwwaehxw309ahx7uewd3hkctcpr9mhxue69uhhyetvv9ujumt0d4hhxarj9ecxjmnt9uq3zamnwvaz7tmwdaehgu3wwa5kuef0qyfhwumn8ghj7am0wsh82arcduhx7mn99uq3vamnwvaz7tmwdaehgun9d35hgetn9ehhyee0qy0hwumn8ghj7mn0wd68yttjv4kxz7fwv3jhyettwfhhxuewd4jj7qgmwaehxw309aex2mrp0yhxummnw3e8qmr9vfejucm0d5hszxnhwden5te0wpuhyctdd9jzuenfv96x5ctx9e3k7mf0qys8wumn8ghj7un9d3shjtnwdajx2un4dehx2unn9ehx2arhdaexktcqyqlhwrt96wnkf2w9edgr4cfruchvwkv26q6asdhz4qg08pm6w3djgcxlara who convinced me, because he publicly deleted a post, and it did indeed disappear.
You will probably still find it on njump, except they changed something recently.
Yeah, it was there a while ago when I originally did this experiment, and I think it was around in people's local Damus cache.
Maybe one day you will also see how much edits just work really well.
It could happen! And maybe someday you'll join the anti-edit masonic cabal.
Edits do work really well in theory. But attackers cause that theory to be reworked.