I tend to agree about home brew recording quality and think there is more to add to the matter.
First, I have to consider storage space, so having duplicate copies of most things is just not practical. Especially when considering the space consumed by open reel tapes.
Second, even though a well made tape on a properly set up deck sounds better than a factory tape, no recording sounds better than the source (I will agree some are close, including my own open reel decks).
Therefore, I tend to not copy my own stuff, with occasional exceptions for archiving a particularly rare or expensive LP (I used to copy to cassettes, when I played them in my car, but those days are over). I mostly record material for which I do not have another source, such as the radio, or something borrowed from a friend, plus an occasional mix tape. Recording on open reels also tends to be expensive, at least compared to digital or cassettes (machine and tape cost considered).
With respect to factory recorded tapes, in almost every case where I have been able to compare a factory reel tape to the LP version of an album, the tape wins. The tape is mass produced; however, in most cases, so is the vinyl. I regularly shop for factory reel tapes of things I don't have, or play often and want to upgrade. Likely exceptions to the tape vs LP debate are hi-end records, some of which are superior to tape IMHO.
The value in any recorder is dependent on what you need it to do. I prefer to use mine as another source to play music rather than purely for the sake of recording (exceptions for live recording noted). If your questions is driven by an interest in duplicating what you have, it makes more sense to make your own tape than to buy factory versions of the same thing on open reels. However, if you want the best possible source material, I recommend consideration be given to replacing your vinyl with a factory tape when you can.
Sorry for the diatribe, but for as long as I have been in this hobby, the ultimate goal for me has been to find the best possible source material (be it the quality of the copy, mastering and engineering or even the performance). Obtaining relatively good electronics and speakers, IMO, is the easy part (there is so much from which to choose), even if not cheap.
Now, with all of that being said, there is nothing as much fun as watching and listening to two big ass open reels spinning on an open reel tape deck, lights blazing an meters moving:)