I have SM strings solo and ens bundle, as well as the SWAM solo/ens. I also use some older libs like Synful and BBCSO that are mixed in for coloring, depending on the playing mode. I have built my own control layer on top of all those engines that simplifies the automation. Reaticulate for Reaper is unique for this capability. You can create hierarchical controls. But as Leandro pointed out, one may need to get this to map better for the higher registers.
Apart from the ones I use, we see that AV infinite strings and maybe the Acousticsamples strings might be under development.
For the record, it was thanks to Leandro’s previous tutorials that I purchased Sample Modeling products, and I am grateful for this. He was also the one who got me into Synful btw. Leandro is a wizard when it comes to midi CC editing. My intent was not to hijack the thread, but rather make the claim that one could consider simplifying some controls if composers are in production mode, to save time. I love to tinker and have the controls when needed of course, and this would indeed be desirable when aiming for 100% control, as opposed to 95%