I'm just wondering if VST3 (or CLAP) support is planned for LMMS at this time or not... ?
Glancing at my own 64-bit system, I have a combination of CLAPS and VST3s in my .vst3 and .clap folders that I successfully use in some other programs. As I moved from Wine(-staging) v9.21 to Wine-staging v11.x, I lost 32-bit plugin support (even thought is SysWOW); therefore, a lot of my 32-bit VST2's no longer work in any program. This means I lost a few free VST2 instruments.
It seems a shame not to be able to use some of my more modern 64-bit instrument plugins in LMMS (even though I mostly seem to have FX). (I use mainly Native Linux plugins, but still have success using ration/vstbridge from github.).
I use Arch, btw. 
I thoroughly welcome both CLAP and VST3 support if it is planned.