Adding to this thread some personal experience, facts.
Have a:
* 2020 NA Expert. Same plugs, same belt. 3,000 miles, no issues.
* 2023 Turbo Freedride, second belt, 1,500 miles, will only reach 7,500 rpm, trying plugs next.
* 2024 NA Expert, 250 miles, only hits 7,500 rpm, replaced plugs, didn't fix the problem. Troubleshooting continues.
My new sleds spend most of the season in the shop being repaired, while the 2020 is just rock solid and just goes. Certainly my limited data concludes the quality of the newer sleds has gone down.