Are there any alternatives?

While 32-inch 4K gaming monitors are becoming increasingly popular, very few include 4K and a QD layer:

　　$799 Gigabyte M32U — A budget 4K gaming monitor that focuses more on features than performance. A solid alternative for media consumption, though it’s not nearly as good for color-sensitive work.$899 Acer Predator X28 — Smaller and with support for G-Sync, though has worse HDR and color coverage.$1,099 BenQ Mobiuz EX3210U — Similar color coverage and HDR performance, but $200 more expensive.

How long will it last?

LED panels usually last a decade or more, so you don’t need to worry about the Optix MPG 32 QD giving out on you any time soon.

　　

Should you buy it?

Yes, especially if you game and handle color-sensitive work. There are better options for contrast, but not many of them include useable HDR like the Optix MPG 32 QD does.