Few thoughts..
1) I agree with the original question. It's plenty valid to ask. NF has lost hundreds of thousands of subscribers in the past several months due to the ongoing conflict and their own stupid price hikes. The fact that so many people are criticizing their content and leaving their service is certainly something for RF Devs to take into consideration when prioritizing their workload. The question also only requires a simple answer: yes, we're not focused on NF right now; or no, it's not abandoned and we'll get to it. That's all. We know there's a gigantic list of provider requests and other things they could certainly be choosing to focus on instead. And that's fine/understandable.
2) The caveat, to this and in general, is that there's no guarantee for any of this. Sure, early on the website may have stated content was "available up to 1080" or similar but that was a point-in-time statement - as should be expected from anyone that understands how this technology works. And even if you don't there's always some amount of risk that the providers make changes to block tools such as this.
3) DRM has been cat-and-mouse for as long as it has existed. Just like software licensing. And hell, just like any type of security control. Those who want to protect something find a way to do so. Those who want to circumvent those controls find a way to do so. Now new protection is needed, followed by new circumvention. Rinse and repeat. I think someone already made a similar point, probably in this thread - there's always an inherent risk the providers will decide to change things up to stop these tools (see "no guarantee" above).
4) If anyone posting here just wants to complain, you're free to go figure it out on your own. If you want to go dig into the inner-workings of the DRM system I won't name, go for it. "Common people just can't do it" < this. If it were easy, everyone would just be doing it on their own. This is not to say that customers should be prohibited from complaining or voicing frustration. That's fine. Just do it in a constructive and polite manner. I'm disappointed I can't currently get NF in 1080 too. And sure, I'm curious if they're going to look into it. But, given the history of RF, I don't really worry about it because I just expect them to fix it when they get to it. I'm not going to lose sleep over it. One day, all RF Dev could just say "we're tired of complaints and have decided to discontinue development."
Does the program have its bugs and issues? Yes. Does all software have similar? Yes. Does AS still provide useful functionality? Absolutely.
I'm not taking any particular side here, am not directing this post at any particular response above, and I understand the frustration on all ends. I'm nothing more than another customer of the product, happily using it for what it's capable of doing right now because I know that could all change again tomorrow.
/sort-of-rant ;-)