I've been using Helix direct into the PA and just using my monitor for my own sound on stage, for several years now and it works wonderfully. I can get heavy tones at conversation levels for tiny bar gigs and I get big sounds outside or in large venues. 14lbs, 3 cables. EASY load-in and load-out, and FAR more flexibility with different sounds than I could get from an Amp and pedals.
You can do like I do, and use only one or two presets per night - with lots of variation in tone within the presets, or you can have over 1000 different presets with dozens of different amps and hundreds of effects.
is it "as good" as a tube amp? Debatable, and subjective, however, in a band mix, it's so close that only YOU will be able to tell and it saves SO much space, weight, and footprint that, IMHO, it's well worth the switch. I still have all my tube amps, and occasionally will use them just to see if it's that much different, but I've pretty much gone full-on modeling for live gigs and rehearsals.
Examples (please excuse the clams and gaffs...):
Here's a good heavier classic rock-tone example...
A good Clean with an overdriven lead at the end...
This is as heavy as we get, but it has huge capability to much heavier...
Lots of effects... reverb, delay, chorus, etc... and going clean to mean with feedback...