Seems good but missing some features
1. It shows errata/obsoleted by/updated by/etc. info only in the listing page; I can’t find a way to see that info from inside the doc. Looking at an obsolete RFC, there’s no way to know it’s obsolete.
2. The RFC numbers within RFCs aren’t hyperlinked so you can’t easily go to the referenced one when you see a mention of it. This includes RFCs mentioned in headers.
3. When you search for an RFC by number, the sorting isn’t “smart”: it is very likely to show you one or more RFCs that merely *mention* the one you searched for, before you get to the RFC whose number you typed in.
All in all a good effort but the above three will likely make this app unusable for me.