20X’s have only been sold for the past year, so there won’t be a thriving secondary market for them.
If you don’t have PrimeCare and the SpeedFusion ability then your failover will be of the quality listed in the earliest posts in this thread. 10-15 seconds of lost traffic until the health checks kick in and switch lines. Ok for streaming, not for zoom, VPN and other interactive work. I had my SF tunnels not enable yesterday and I wondered why my work remote access kept locking up.
Yes, you can reach the statistics page, but you have to also put in a switch and use one of the workarounds discussed this this thread:
If you aren’t going to use the SDWan capabilities, you would probably be better off with a generic PFsense or OPNsense system. Those support “up/down” on multiple WAN links and static routes on the WAN for the statistics.