I know 30 webmasters forum.
29 was build with xenforo
1 with IPS
The IPS was the first and old age among all since 2018 to 2025 with current 200k+ members
The rest with xenforo was site from 2020/2021 to 2025
About 7 of this site have same large audience as the one build on IPS.
All have alot...