As I have noted before , I have become a fan of Cantabile
https://www.cantabilesoftware.com/
which also has a free version. It supports multiple VST instances, and has very flexible routing.
Looking at the blurb on Plugin Boutique, vPlayer is stated to be limited to 2 instances, but it’s clear from the downloadable version on Digital Brain’s site
that the limit is actually 4.
The PiB text also says that recording is via ReWire, which is a dead protocol, but this isn’t mentioned on the author’s site.
I have edged more towards Cantabile after buying the simplest paid for version (about 70 bucks which apart from all the other features, has great midi processing. It solves the Live problem in not supporting multi-channel midi trivially, and for considerably less than the route suggested by PiB for plugins like Instacomposer (which I quickly abandoned) which was with the Blue Cat Audio product, which doesn’t actually work as advertised.
When I last tried Nanohost, it didn’t appear to support VST3’s, but that might have changed.