With Haiku I like that I can use the computer without having to resort to dark mode like the other operating systems. The other systems are just too bright, while Haiku interface is warm and on-point.
We are yet to see for how long Apple is going to support their Apple Silicon machines, but this definitely sets a precedent for Apple. It would be really shameful if they go the iPhone route and cut support after 6 years of updates.
On the other hand, Apple is still selling the iMac with a 2020 chipset, so we could say that they look like they are committed to providing updates. I hope they wouldn't just cut off support in 3 years time.
Also, number and percent formats are important too. I've seen many 'professional' websites/software, that uses only a standart 100.0% format, where the decimal and the percent are not localised.