Every current iteration has to deal with comparisons to what we could be getting instead, to a greater or lesser degree. Getting this means we're not getting that.

I remember older fans complaining that TNG's existence ruled out the fourth season of TOS that they really wanted, just as I remember being disappointed that ENT's existence put a period on the TNG-era.

(Though I will say that my distaste for ACA is not about lost opportunities but about my failure to get pulled in to the setting and story. I don't mind it existing, though! De gustibus non est disputandum and all that.)