when people talk about having a "container" to mix and match different parts of NDSP plugins, is there really that much to gain?
For instance, when I use Helix, I'm regularly using different plugins either side of it - sometimes because there's a specific effect I'm looking for that isn't in their software, and partly because plugins offer the freedom to combine all of your favourites. It's rare that one plugin just happens to have my favourite boost, compressor, delay, reverb, amp sim, cab engine etc.
While on the surface I can see why it seems like a good idea, I still feel like I'd just end up using other plugins too and the net benefit would end up being very small. I don't think I've ever wanted to use an NDSP plugin for JUST the delay or reverbs, or boost pedals - for delays and reverbs there is just so much choice of insanely high quality stuff out there that I never use the built in ones. The pedals are fine, but there are so many tubescreamers and rat's and big muff plugins out there that I'm not really fussed which I use. There are some very specific FX in neural plugins like the octave bits in Gojira or the synth in Rabbea but it's easy enough just to load that exact plugin if that sound is called for. I don't mind stacking 2 or more NDSP plugins together if need be - I don't think I've ever been in a situation where more than 2 was necessary.
There are other plugins that do the container thing and generally they become a bit shit in other ways - automation, MIDI control, GUI, licensing, speed all take a bit of a hit. Softube Amp Room or Amplitude are good examples of the trade offs.
TLDR; plugins are already a kind of container that allow you to mix and match WAY more freely with all your favourite stuff.