I think replacing the tubes prior to a need to do so is a good idea. Having a backup set is handy and you may rediscover your preamp.
How long should Pre amp (12au7) tubes last in Rogue Preamp?
I've always heard Rogue equipment drives tubes hard. My RP-5 (purchased in OCT 2017) still sounds great with the stock JJ's. No distortion or any added noise. Typical life (in hours) of general 12au7's for a Rogue preamp? I may try the newer Gold Lions next time, although I am happy with the sound of the JJ's