I'm hearing I need to downgrade the Bootstrap in my suite? (A young addition). Which is great because Bootstrap 2-3, whenever I used it, was pleasant. I wasn'

I'm hearing I need to downgrade the Bootstrap in my suite? (A young addition). Which is great because Bootstrap 2-3, whenever I used it, was pleasant. I wasn't aware of the development timeline, thanks for the lead. Not flat is appealing. I picked ExtJS 2.0.2 for a specific reason, seemingly rando old trusty version as base.