Solwise 200AV
I use exactly the kit you have pictured here. I've had a piggy 6 and a single port 200AV for several years and they've been Ok with only a couple of re-pairings needed.
Exactly the point of your article, more devices needing networking, so I bought another piggy 6 but the 3x system lasts barely 24h before needing switching off and restarting and usually repairing. It's now a PIA and I have CAT5 strung across the floor.
Not entirely sure it's Solwise's fault, it's probably "noisy mains" it seems to have happened since I started charging a set of IP phones - small chargers are particularly bad at introducing noise on the mains.
...and guess what else has been multiplying exponentially in the home over the past few years...small chargers.