While I do agree they should (and we all know they will) be replaced, but if enabling 3x and 4x extends the hardware's life a bit longer before being replaced I'm all for it.
I'd rather see them invest in areas that lack b41 first before replacing hardware that could potentially still serve areas well for a bit longer.
Clearwire sites are gradually being replaced. I've found at least 4 in the Kansas City area that have been upgraded from Sprint NV/Clear B41 to 8T8R or from Clear only to full Sprint equipment. Doesn't help your market, but this should be happening in most Clear markets to some degree.
Sent from my LG G6
Happy to see them doing this but they really should be replacing these sites with newer equipment. These clear sites are in some of the busiest areas. When Wimax was around these site provided all the coverage. I was hoping to see Mimo equipment replacing these sites this year.