I just replaced mine as they were abscessed or impacted and I didn’t notice a change, but that was over several years. I would have died in the middle ages.
If you can afford it I recommend getting the worst of them replaced with implants. If you can’t then get some partial dentures to replace whatever you’ve lost. It will help both your confidence and quality of life.
I’ve got a mouth like a sailor who stubbed his toe, mostly because I used to be a sailor who stubbed his toe a lot. Between my foul mouth and my either overuse or utter absence of fucking commas depending on how drunk I am I don’t think I’ll ever be mistaken for an LLM.