L6 and Fractal purpose same FX (and amp/cab sims) in all devices. Block's number is reduced but not at all something that prevents us from using this device on its own.
Helix stomp offers more FX blocks than a Kemper Stage.... I don't even speak about FM3, the number of blocks seems to be very important.
As i said i had a Helix before and my FX chain was smaller and smaller. I could easily switch/copy a simple Rig from a unit to another one if i had a Helix and a stomp.
Those two limitations all together with the player would prevent me from doing so....
Regardless of how you want to look at it - the HX Stomp is limited compared to the bigger units. That's all I said.