I type a lot and I type fast. The feel of my everyday use keyboard is important to me. I prefer those expensive mechanical "clacky" keyboards for their feel, accuracy, speed, and implied long term reliability. In theory, those expensive keyboards should outlast all of us, based on their MTBF claims. In practice, some brands hold up well and others do not.
Matias Tactile Pro, Not Recommended:
I have had six of them fail, most within a year. None lived to three years. I bought three (home, work, lab/offsite/spare). Matias replaced all three under warranty as they failed, but refused to honor the warranty for the replacements, even when the replacements failed within their warranty period of the originally purchased keyboard. Honestly, after those next three failed, I felt that I had tried enough. The feel of those keyboards is exceptional, but it does not matter if you know that one or more keys are likely to fail within a year. These are pricey keyboards, and I do not think of them as "disposable."
Matias Quiet Pro, Okay But I Don't Love the Feel:
I bought a Quiet Pro during the Tactile Pro debacle. Mushy keys. Some people may like them. I still wonder if it has not failed because it is better or because I don't like it and do not use it much.
Das Keyboard 5Q, Software Sucks but Keyboard Pretty Good:
Das Keyboard could have had a monster hit on its hands with this keyboard if they had only released their software as open source. Instead, the crude, buggy, CPU-hog code has languished in proprietary hell with a mandatory internet authentication to use it. Key feel is not perfect, but pretty good. Keyboard good, software bad.
There are many great, reliable mechanical keyboards on the market. I have yet to find the perfect one. I am happy enough with the Das Keyboard 5Q. (The current version is "5QS".) I like its backlighting and feel, but do not like the software. For that reason, I cannot recommend it to others.