Good afternoon I have a old RB 750
Is been use for years with the old firmware is have no problem but I like to give a tray with firm upgrade is good idea or to leave it as it is
The details of it is
routerboard: yes
model: 750
serial-number: 2F2C012097D1
current-firmware: 2.38
upgrade-firmware: 2.38
Regards Theo