With their OTL stuff generally I see people keep the tubes stock, but with their transformer coupled amps I do see people swap them up more (I think it also comes down to how common the tube type is, some of their products use some more lesser known tubes). But I’d also say it’s not uncommon for mfg to suggest people not swap tubes when it’s def still worthwhile, viva is another one where they say stock is best and it’s clearly not the case, and many others (but some are serious)
A full allnic chain is very nice, at least a speaker one with a turntable source, I’d like to hear their dac for sure as well