The BGM is only 1/4" deep, I've measured. The QLA must be 3/4" to 1" deep, haven't measured one?
The 2020 Paramount is going to be threaded for a brake, so we'll just have to wait and see if they use the BGM or not. Unless they will be promoting a new bullet without a skirt like the Paramount ELR, which I doubt, pretty sure the BGM will be there. So if someone wants to remove a BGM with a recrown and only lose 1/4" of barrel, the 2019 models would be less too contend with. If the 2020 threaded models have the BGM, then you would have to remove at least 5/8" of barrel, recrown, then cut new threads.
The SHOT Show is only 30ish days away. I'm sure we'll know by then, if not before.
Once the 2020 models hit the retailers, I'm sure there will be opportunities to buy the 2019 models for under the $800 like there is now. If you are going to remove the BGM, recrown and (re)thread anyway, you only lose 1/4" vs 5/8" if the 2020 has the BGM.
I'm hoping they put the fast twist .45 on the 2020 Accura MR. We should know in a month.