Windows XP "gets the job done," but that still doesn't mean people should keep using it. Once something looses support, it's best to just move on.
99% of the CFW's can do that and not only better, but more secure and a lot faster. What are you going to be loosing by going to another CFW? The tools? Sorry, but RXTools isn't even good at the other features it has built into it and later builds don't even have the tools anymore. Regardless any other CFW+decrypt9 will gain the same results as RXTools, but do it better.
You don't even have to install A9LH, there are only 2 A9LH exclusive CFW's, all the others still work with previous entrypoints. Regardless, both ShadowNAND and AuroraWright's build can boot without an SD card. Not to mention it's actually super easy to remove A9LH, you can either use SafeA9LHInstaller or simply flash your NAND back that was made pre-A9LH, which you should end up with like 5 of them at the end of the A9LH instillation process.
How is RXtools easy or simple? Do you even use half the features built into it? If all you are using it for is booting into an emuNAND, then you really aren't even RXtools. You are using a few other CFW's are actually doing better at with actual support. You don't even have to start from scratch to replace your CFW, every single CFW will work just fine with your current set up.
RXtools is so dead, even the project that was intending to bring it back seems to be dead in the water. Please, use a different CFW, it won't hurt to actually change. RXtools isn't a good CFW, you are just used to it because it's what you've been using, but there are far better options that are, safer, secure, and more importantly, still up to date. Yes RXTools is working with the current OFW update, but for how long? Sooner or later, it's going to break and when it does, you are the one who let it yourself suffer.
It's the most noob-friendly CFW I've seen. No need to search for firmware.bins, or this file, or that file, Just drag and drop, profit. Just because people don't know how to follow simple institutions isn't the fault of the CFW. There are noobs who learn and make a few mistakes and then there are the special kind of noobs that even Luma3DS is too advanced for. Since we've had downgrade from 10.7 and below last longer than a month, we ended up with more of the special kind of noobs and that's pretty normal for the Temp.