One thing I REALLY like about the newer RRS plates is that they have QD sling swivel receivers machined into the plates (bottom and side for the L-plates).
I've migrated to a Magpul MS3 sling for my camera strap, clip in a QD swivel, and just pop it on and off as needed. Plus, if the zombies attack, I can quickly strap on the SBR once I get done taking pictures!
RRS is truly the LaRue of camera mounts.
ETA, I've got a LT100 ($135) mount for my TA31F ACOG ($1,000) on my $800 SBR with the $600 can, so why not get a $150 RRS L-Plate for my $1,500 D500 body and up to $1,000 lens? Buy one, cry once.
I understand budgets and all, but when I took the ARCA plunge 2 years ago I've fallen in love with the permanently attached L-plate. Leaving those proprietary Manfrotto plates on the body all the time sucks ass, and taking them off an on all the time sucks ass.