Extremely late to the party (might even have missed it totally… ).
Coming from a guitarist perspective. And as a owner of Nord Modular G2 Engine and OT among other gear. I’d say that both are such deep level that any of them will outlive you rather than other way around. Once your experience/knowledge level are at a certain point. You’ll realize that you can never fully explore them without finding new ways to approach things.
Modular (digital with computer editor) gives you a radical freedom in exploring without so much of a risk of burning modules up (as in a real analog modular system) because of a faulty connection somewhere. Not fun seing $$$ being burned because you didn’t have your thoughts clear at the moment. Anyway a system thinking will be needed if you want to get creative and make music. Or at least an idea of a system you’d like to implement.
Sampler (i e OT) is in a way a more of an audio perspective (samples) instead of modules. And given the limitations within the box you really have to imagine/explore your way around. However the system thinking approach are needed there as well.
Anyone feeling that they missed the train of either Nord Modular G1/G2. Can choose to go computer with many software options aviable, however there might be quite some amount of peripheral units needed to get a functional system (audio interface, controllers). However, if you’d like an more possible set-n-forget system (like Nord Modular G1/G2). One recommendation would be to look into the Axoloti board. You will need to get/make an enclosure for it. But on the other hand you are fully able to make it resemble an Nord Modular Micro both in size and controllers (but more advance possibilities in it in comparision). Somewhat like as if the Nord Modular Micro would have been released recently.
Lots of inspiration from Nord Modular among others. But you can setup and use it without computer if you want to. And it can be a host for usb midi controllers. Some limitations/bugs for sure. But that were/is in both Nord Modular and OT too.