The Sky3DS(+) has a lot of limitations, is expensive and (in my opinion)
harder to use than the free cfw; installing cfw is a little more work, but only has to be done once. That’s what I got from your previous
thread: It only emulates retails cartridges and needs completely unmodified (encrypted) cartridge ROMs of the same region. This is
very different compared to flashcarts for older systems. R4s or Everdrives can play pretty much any ROM(-hack/translation) and homebrew on the corresponding system.
If some newbie asks “Should I buy the Sky3DS(+)?”, I (and most others here) would say “No.” with pointing to the price and limitations. This is not applicable in your case, because you
already have the Sky3DS cart and are absolutely sure about not using cfw
after reading the arguments.
For DS-ROMs a flashcart is still the best and easiest option. TWilight Menu++ is fantastic, but still not perfect and newer games need to be patched → bad if you want a “drag and drop” experience.