one or two on a live event still pulls some eyes imo, like during a match or some big announcement when people are actively clicking the tag to follow along. outside of that yeah they do nothing for me on X anymore. i tested it on a couple accounts in the same niche, one with hashtags one without, posted similar stuff for like 3 weeks and the no hashtag one did slightly better if anything. probably the spammy look thing.
honestly id just run your own little test instead of trusting any of us, every niche behaves a bit different. but for general organic reach... nah, dont sweat it.