SOLVED:
Thanks for your comment LBH! So ... my bad ... apparently I have at some time, long forgotten, moved my Program Data folder off of the SSD and onto the RAID disks, which are obviously much slower. I copied all Arturia related files back to the SSD and there was a drastic increase in speed. Still not perfect, but as the PC came with a so-so SSD chip I'll go shopping for a faster one today which will likely improve things even more. Duh, I feel a bit stupid now.
Original post:
Pigments 3 takes more than 30s to start - both as plugin and standalone - and Analog Lab V takes even longer. I have a Windows 10 computer, i5-10400 CPU, 48GB RAM, RTX 3070 Video and decent disks. My DAW is Studio One 5 Pro. The loading times decrease a little if I move everything to SSD, but it's still painfully slow. Everything else loads and runs fine, so I have to think it's something specific to the Arturia plugins, or Arturia plugins in Studio One. Are there some known settings or optimizations I can do to speed things up?