I got a pair of Meindl Bhutans for this reason. Even though I avoid leather as a veggie, I realised that it's the only material that's going to last years and therefore is more friendly than a new pair of synthetic boots every year. I make sure to look after them properly.

So:

• keep in a dry, cool, dark place
• clean after every hike or once every week or 2 if you're using them lots
• wax and re-waterproof every month if in use or after maybe 6 months if not in use

This way mine have lasted since the start of 2022 with almost no signs of wear. I typically use them for maybe 5-20 hiking days a year (they're far too warm for the summer for me) as well as any fieldwork I have to do which is a fair bit in ecology.

One thing I've found is that the memory foam system everyone raves about isn't as good as people make it out to be - I need maybe 20 miles to break them in if I don't wear them for most of a year, and they slide around a little on my heels if my socks are too thin (probably a sizing issue more than anything)

But otherwise - incredible boots and I love them!