I'm reconsidering stereo for small venues.
A little history
I used to run stereo for my electric guitar (with loads of effect), but I set that aside in June 2004. I remember that distinctly because that's when I got my first L1®. Since then I've run multi-mono. That means I run every sound source on the stage through only one loudspeaker. In the early days, that meant one L1® for each performer.
I appreciated the Cocktail Party Effect and veered away from stereo for guitars. I was using L1®s for all my sound reinforcement needs. The L1®s have such wide horizontal dispersion that you can use just one in many situations. You don't need two to cover a room.
Fast forward several years and the L1® Compact made it even easier to set up and tear down for smaller venues. It sounded great and had horizontal dispersion similar to the larger L1®s. I tried stereo using two L1® Compacts. I didn't need two to cover a room so hauling around twice as much gear wasn't worth the effort.
When the F1 Model 812 came out in 2015, I started experimenting with stereo again. A couple of F1 Model 812s can sound great for stereo, but I wouldn't consider bringing two F1 stacks (F1 Model 812 with F1 Subwoofer) to a small solo gig any more than I'd bring two L1® Compacts.
A little present - the S1 Pro system
I have been exploring using the S1 Pro system with Guitar Amp Modellers. Toward the end of that thread, I said,
I almost never run stereo outs from my Kemper Profiling Amp. It's too much gear to carry (two L1 Compacts or two L1 Model IIs - I mean really!).
And when you run stA ereo you lose the Cocktail Party Effect when playing with others. All of a sudden, the guitar sound (no matter how glorious), is everywhere.
I just tried out running stereo with two S1 Pros. Oh my, it's glorious. I would definitely do this for a small solo gig. If I use the Boss GT-1 I could run everything on batteries.
This is a lot of sound for 30 pounds. (13.6 kilograms - but I liked the rhyme better).
Food for thought.
Since then I've happily spent hours playing through two S1 Pros. Because the horizontal dispersion is 100 degrees, you can justify running two to cover a room. You don't have to use two but makes it easier to get the sound where you need it.
The T4S ToneMatch® mixer is stereo and it is easy to manage two S1 Pros with it. I had planned to keep a T1® to use with an S1 Pro. And now, I'm thinking about a T4S and a couple of S1 Pros. The sound of stereo is just that good.