Can I have a take on this? well, I believe Rxtools was revolutionary during its time, back then, 2 years ago, your only option to run a CFW was Palantine CFW, which was baaaaad because you had a risk of bricking the console, and some stuff was inserted inside the Sysnand without any recovery to cover up the fails, so if you did a wrong move, there you go, your 3DS is as good as dead, so getting RxTools in 2015 was a bless, the emunand certainly took its fair amount of space, but it was certainly much better than installing stuff on sys without any recovery, since you now had emunand to back it up + you could update it, with Palantine you were restricted to the amount of games you could play too, Rxtools was the savior of that era
And even though Roxas didn't continued the support for this CFW, it opened gates for plenty of developers to start their own take on this, Cakes CFW was created shortly after rxtools, and ReiNand was actually a quick boot of Rxtools, which later on developed to be its own thing, yes, Rxtools is an outdated software by now, yes, Rxtools can't even compare to modern/updated cfw's of now, and yes, even Rxtools can't run some of the modern games Nintendo has to offer, but I believe that this CFW shouldn't get the amount of bashing is receiving now, specially since without it, you wouldn't have gotten all the CFW's you have now, A9LH or Luma was based on Aurora's take on ReiNAND, and Reinand was originally a quicker alternative for launching an emunand, which is related itself to RxTools
If some developers were to take on the concept of Rxtools and expand it to modern standards, I have no doubt that it would beat Luma easily, the problem is, as you mentioned before Crystal, too many parts of this community are Luma diehard fans or just toxic people in general, this is just giving developers a hard time to create something that improves what we know about the 3DS in general, I hope there'll be a day when people can accept what someone else uses, I'm no developer myself but heck I'd love to do something if I had the knowledge and information available, but I'm not, all I can do is watch how the 3DS scene unfolds, hopefully we get something within the upcoming years