But EdgeOS was not the only fork, another one was VyOS (vyos.io). Pretty sure, that EdgeOS has done larger steps forward, especially, since it was bound to the hardware's developer.
So even though VyOS exists as the modern day Vyatta fork that is active and fully-featured, you can't really run it on the EdgeRouter hardware and since Ubiquiti stopped development, they're basically e-waste.
I still run one in a network but really shouldn't, since Ubiquiti are very rarely shipping security updates...
EdgeRouter 3.0.0 [1] adds official wireguard support (I've been using the "wireguard-vyatta-ubnt" package from Github [2]), UI changes and some other improvements/fixes. I haven't tried it yet but will. I have an Edgerouter3-lite and an ER-X.
[1] https://community.ui.com/releases/EdgeRouter-3-0-0/33ee3852-...
The new GUI looks nice and Wireguard is great! Not all good news sadly though, users in the comments there are pointing out that the kernel has hardly been patched from the versions two years ago... At least some packages like OpenSSH, dnsmasq etc. have had updates.
the one key point was that the EdgeRouters had hardware acceleration
The main problem with the EdgeRouters was that Ubiquiti was basically just assembling off the shelf stuff. They didn't have the ability to fix SoC issues (or motivate the manufacturers to fix them). For years they didn't have the ability to do much Linux dev work either so the ER families languished on an end-of-lifed'd version of Debian. That experience and realization only motivated me to avoid future Ubiquiti products.