My son... has been picky with food since he was 6 months old starting solids.
He is now almost 4 years old. And for me, I never battle about foods, nor stress about it. He is healthy and grows like a weed and is in the 97-98th percentiles for growth and weight, anyway. Despite his picky eating. He is picky in terms of the texture AND the kinds of foods...
At his age now... he eats more things. I don't 'cater' to his food likes/dislikes. But I KNOW him... and what he will eat. I also rather have a kid that knows their body cues and feelings of 'fullness' versus just eating to 'please' me.
I don't battle about it.
My son, naturally eats more variety now. Most kids will as they get older. But even in the easiest kids who eat anything, they TOO have eating likes/dislikes. My daughter eats anything... but has spurts of food dislikes.
They have their own taste buds...
Its fine.
I never bribe/force/punish for eating.... I go by their cues.
I don't make eating a battle.
My son, only this week, started eating peaches and asparagus. Great!
All on his own and his own curiosity.
Also yes, texture is something babies/kids go by as well. Each kid being different. Their whole sense of foods/textures are STILL developing. That is why.
Of course at this age, they may need to eat pureed foods,or for safety. It does not matter how many teeth they have. Foods can still be a choking hazard no matter how many teeth you have. So go by his cues....
or instead of 'chunks', feed him mashed pieces, instead of strictly 'pureed.' Maybe that will be a transition texture thing, for him....
Or ask your Pediatrician... if you want to rule out anything...
all the best,
Susan