The poll means that there are at least 267 members owning a MK4 Jazz
I've had Honda Jazz cars since 2010, the current car is No6 and my second Mk4, a 2023 Advance.
No problems of any sort with any of them
Totally different cars though, with totally different drive trains. The latter only a year old, so I hope you can say it still performs as well as the Mks that went before it as the years roll by.
I accept what you say, my first Jazz was an I-shift, which nearly put me the Jazz for life, however the others up to the Mk 4 were all CVT’s, which perhaps I didn’t keep long enough, to run into the oil change issues. The first Mk4 was a 2021 plate which covered about 15k miles, with no issues. For me, I consider the current drive train/performance to be the best yet.