It's hit or miss in my experience. My first Baofeng was well behaved as far as RF interference, but it was so shoddily built that it literally fell apart on me a couple of years into ownership (the battery latch, belt clip, and TX button all broke within a week of each other).

My second Baofeng was more physically sound but had issues with RF harmonics on UHF so it was useless on the band I wanted it for.

I've since gotten a Radioddity DMR handheld and it's both physically and functionally sound. It cost the same as four Baofengs but it's worth it, not to mention the ability to talk on DMR groups.

i have measured several models and not witnessed this

Most Baofengs emit an illegal amount of spurious emissions[1]. Maybe you got lucky.

[1] https://observer.wunderwood.org/2020/02/07/baofeng-hts-and-s...

huh, I checked and they are all manufactured after this was published, maybe they got better. but probably not

Depends which band they are being used on. Their filtering is barely adequate on ham bands, but very poor when programmed on other frequencies.