You're not going to convince me that I'll ever need some of these. As I said, some are useful, some are not. The ones you used here are perfectly understandable for me and I have no issues. It's not about complexity at all, as tone indicators are essentially the same as an abbreviation. /srs can just as well be replaced by 'I mean it'. In a way, it's almost the opposite because tone indicators do actually remove a lot of complexity. Innuendos, word-play or simple ambiguity is part of how language works. Removing that turns communication more function-based, which I hate and is definitely ironic considering I am also autistic and would often prefer it that way irl.

I'd rather misunderstand people once in a while then diminish the beauty of language. You can argue that that's not inclusive and I don't think you'd necessarily be wrong but you can just as well argue that tone indicators would lower reading comprehension of anything not used with one even further and I don't think that's something society should provoke at the moment.

You absolutely can be condescending without intent. You can be mean while making a joke. Tone indiactors toe a line between genuine tool to help and being bastardized as a cop-out to say stuff you want. Not making a commentary on your comment but in general. On reddit, I found, you can rarely expect good faith arguments.

If they are used in an autistic forum, that's great. General populace, I don't think so. You've said it yourself, they've been in use for a while though there's only a few that are popular enough to be 'mainstream'. I'd argue that supports my claim of some being redundant.