Who says they only last this long, it’s a urban myth that’s been thrown around the interweb for a long time now, HAs can and do last much longer, just as some only last 2-3 years, I’ve been in very humid weather for months on end without issues, I think when the nano coating is not up to scratch on some batches of HAs, corrosion is definitely up there as a common circuit problem tho, so you’ll be fine if that’s your solution when things get a bit hot outside.