Anecdotal, I have seen Razer mice go bad, but Naga. Various Naga, btw, though admittedly with extensive use. I've also had various Razer keyboards go bad. Deathadder mice, however, have been great for me (I've had two). I even had one of the first for almost ten years. You can replace the feet on these mice, btw, but it isn't well advertised. Also, keeping them clean and having a good mousemat helps. A friend of me had a Razer mouse double click issue (unsure which one) and used a piece of paper to fix it.

The Deathadder was once a legendary good mouse but Razer no longer delivers the quality for the price I'd appreciate. And they seem to focus too much on their disco light BS (Chroma) which I don't need. Their mechanical keyboards are in my experience lousy (Anansi also didn't suit my needs): noisy and cheap key caps. I do like that my BlackWidow has USB passthrough on the right side. Works very well together with YubiKey and/or fingerprint reader.

FWIW, I'm in the market for a new keyboard which can be used for (but not primarily) gaming (don't need dedicated arrow keys, home/end/del/etc nor keypad) but has to be a silent, mechanical keyboard with USB passthrough on the right.

Likewise, my Razer Deathadder's at least (at least!) 8 years old and is my daily driver on my work machine, which sometimes gets appropriated for late night FPS sessions.

it's grotty as hell, but works like a charm.

Just adding this here as I've read a lot of complaints about Razer over the years, but I know complaints are louder and more frequent than quiet appreciation.

/anecdotage

I swear by razors, I've used two DA's over the last 8-10 years. Both succomed to a failing middle button/scroll, and double clicking issues (although only on the middle button for me), but it took about 2~ years for the problem to occur, and another 1~ for it to get"bad", which I considered very acceptable.

I've unfortunately heard that the build quality has dropped in the interim. Don't know how much truth this is, currently debating my next mouse. I would straight drop 1-200$ if I could get a DA form factor/weight but with a better middle button and a handful of more function buttons along the mid-line/sides, _and know that it would last_ but all the options I see nowadays seem to be "From that list, choose ~2 things". If anyone has opinions, I'd be curious to hear, since god knows I trust here more than Amazon/Newegg reviews.