Thyatis and Alphatia get together for a joint operation and sack the Radiant Citadel.
Link?
Even if a player can't do a voice, I at least expect a change in cadence and vocabulary. When someone is playing a paladin, I expect them to talk like a paladin. Sadly, even getting people to put in that much effort can be a tall order at times.
It's like, man, I am literally presenting a world for you to play in and presenting you with challenges, and giving you cool magical items when you succeed at them. Least you can do is not call people "dude" when you're a dwarf cleric. That's more than fair, damn it!
If you can't snap voice a character you can't play them, and trying to kick off proper rp with those people is like trying to set rocks on fire.
I'm of two minds, sort of like I am with every-turn initiative.
In an ideal world its much better if everyone does a voice and puts on an accent.
In a realistic world, things go much smoother when people can just talk normal.
It is much better when people do a voice, change up vocab, etc. But its hard to free-form respond like that.
Hell, I have NPC notes and a general idea of the conversation topics and it can still take me some time to build an appropriate response.
If everyone is fine dealing with some abstracts, I am ok with players saying "I complement the merchant before getting down to business", because at some point I'm going to mulligan on an NPC and say "You get several minutes of bitching about the Kingdom's finances before the Vizier gets down to the business of the Goblin infestation".
Its good information to get the players to recount tales of their travels - its fun to see what sticks in their minds vs yours - but that is also a lot of table time, especially multiple times an adventure. So I usually let them go with "you tell <NPC> about your travels; is there anything you hold back or anything you embellish or make up?"
Everyone has limited time and mental space, and you gotta make some compromises.
The other thing is doing a voice doesn't guarantee shit. The chaotic-bored player I've complained about before did voices for some of his characters, and being a booming paladin or squeaky chipmonk halfling or Thog-Talk goblin didn't change that after two sessions he was shit-stirring as himself not his character.