It depends on what you do.
If you are involved in image processing, yes, a good quality monitor is important, but equally (or more) it is important to properly configure and calibrate it.
If you are engaged in web design, it is important to have a decent monitor, but again, only if it is configured correctly (contrast / brightness / color balance).
If you are just “writing code,” it’s important to have a monitor that looks like your eyes, color replication is not important. A monochrome monitor can stretch it, syntax highlighting is good, but even vim and 16 colors are “enough”
The term “quality” is also slightly “dependent on”. · CRT has much better color replication than TFT, but I would not recommend them (I always thought that reading text on them is difficult and difficult to find, cumbersome and currently not recommended).
For web design, almost any monitor will be perfect if it is not a 10-year-old CRT with a broken red cathode tube. Again, as long as it is configured correctly, most monitors are capable of displaying the color "reasonably good"
For "writing code," I think that size / resolution / number of screens is more important than color replication, as shown by most of the answers to any of these questions.
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