This is likely just my opinion, and possibly not shared by others. When I hear "progressive", or "prog"...it mostly makes me think "keyboards/synth" added to whatever the type of music.
I don't really think of "prog" or "progressive" as its own category of music, but rather an adjective or descriptor which further defines a certain genre.
Keyboardist in a Dave Matthews tribute band: Big Eyed Phish
Korg Kronos 73
Korg Triton ProX
Korg CX-3 Clonewheel organ
Native Instruments Komplete
Mackie 16CFX Mixer, MoTu 828 MK3 Ultralite
Shure PSM200 In-Ear monitor system
Shure SCL5s and E2 earbuds