So? I didn't say Noctua were bad, just over-priced. I have Thermalright TY-140 and TY-143 fans that have been running non-stop for similar number of years .. as well as some GTs and a few others. TY-140 were £3-4 each, TY-143 were about £6 each, can't remember what GTs cost me. That's 1/3rd to 1/5th what Noc's cost at the time. Go-to low cost fans of today are Arctic P series at £4-6 each compared to similar performing Noc's being several times more money. Even if P series fail in 5 + years, that's still cheaper over 10-15 years of use than a Noc. Keep in mind it's £5 each now and them 5-6 years from now anther £5-6 instead of £15-27 for Noc today. I would much rather pay £6 today and maybe again in 5-9 years than £20 today and hop it lasts 13+ years.Noctua fans have been the only one that have been able to run non-stop for me for 13 years. So I'd back them. No other fan has been able to do this since my Pentium 66 days.
Also, Nocs are not the only good quality fans out there. Others ilke Thermalright TY-147A, TY-147A SQ, Phanteks PH-F140MP PH-F140SP and GTs to name only a few last a long, long time too.