There’s been a Python issue tho where 2.x has been where a lot of apps are but is based on a 2016 version of Fx. A lot of services probably forgot that they supported KaiOS & when they heard 3.x, despite the upgrade process not being too bad, a lot of apps dropped out support for the platform. The 3.x devices are also much more difficult to root/mod which removes the cool hacker scene of 2.x or Linux/Android.