Breathing heavy. Is this Asthma?

I have a question about asthma and heavy breathing

General background:
Okara will be 10 years old this fall. I've had her since she was about 5 weeks old. She was a semi-feral rescue from a dog pound.

Medical background:
She had all of her teeth removed at age 2 due to gingivitis. She was spayed around 1 year old. Within a year or so of having her teeth removed, she started breathing heavily when agitated. Her vet said she was likely developing asthma, and it could possibly be related to removing her teeth. She was not thoroughly inspected for this. I just kind of kept an eye on her and she never got any worse. She has never had any other sort of issue that required a vet visit. She is a very tiny cat; most people think she is a kitten upon seeing her for the first time. She is a healthy weight at about 3 1/2 lbs. Her ears are kept clean. Once a week or so, she might vomit up part of her wet food; it usually seems to happen when she is eating too fast, and it only started occurring once she had her teeth removed and was put on wet food. She keeps herself clean. She and my other cat are always kept flea-free with monthly topical treatments. They are both strictly indoor-only cats and have been since I adopted them.

Personality:
She's a bit prissy to other animals, but she loves humans. Historically, she hated my other cat and avoided him, but over the past few months, she has started playing with him and has become happier. It's actually a bit strange because she just seems "renewed," and it seems like she's happier now with heavier breathing than she was before.

Dietary:
She eats small pellet dry food and one can of wet food per day due to her loss of teeth. She has NOT experienced any sort of appetite loss. She has always had a very healthy coat.

Issue at hand:
As mentioned, she has always breathed kind of heavy since she was 2-3 years old--it kind of sounds like snoring at times. She has no nasal or eye discharge, nor has she ever. When she is laying still, her breathing is silent about half the time, but she still might sound like she's snoring even if she's laying still sometimes. When she is playing with my other cat or otherwise exerting herself, she'll start breathing heavily. Even when she's breathing heavily, she does so through her nose; I've never seen her breathe open-mouthed. Her purring sounds like loud snoring. If she gets upset, like if my other cat tries to rough-house with her, she might start having what seems to be an asthma attack from what I've seen/read online. I don't know if I'm just imagining it because she's breathed heavy for so long, but it seems like her heavy breathing might be becoming more frequent and/or louder over the past couple of months.

Can asthma get worse as a cat gets older?

Does this have anything to do with her having no teeth?

Is there some other disease that could potentially be causing this?

Thank you!