I own a Brume 1 (no wifi) and use it as my main router. ISP >> Brume 1 >> TP-LINK EAP660 HD AP so Wifi is covered by 3 Access Points (DHCP is served by Brume). In between there are switches around the house for wired connection.
Brume 1 also serves AdGuard Home and Wireguard VPN (server) without any issues.
Thinking of the future, when the brume 1 stops being supported… Can I replace it with Brume 2 in the same way? (no VPN client, just acting as a WG server for incoming connections + adguard)