OpenWRT router

I am looking for a router, and OpenWRT came up. I was looking at their table of hardware and the ASUS RT-AC3100 seemed like a good option, as its cheap used, (~$40 USD) and supported by the latest OpenWRT version.

Thing is, its EOL, per Asus. Does this mean that it won't be supported on OpenWRT for much longer?

Is there a way to see or estimate when a router will no longer work on OpenWRT?