With higher-end headphones, IEM's, or connected to an even mid-level amp & speakers played sufficiently loud, playing music you know well, I'm afraid MiniDisc equipment's limitations become apparent.
Hi-MD mode on Hi-MD MiniDiscs is the only acceptable way for sound quality, that is, at least CD quality.
Even Atrac3+ in 352kbps isn't up to it, you can hear compression artefacts if you pay close attention.
I ditched my entire collection of standard MiniDiscs once I heard the difference, and starting adding up how much Hi-MD MiniDiscs would cost me for my growing musical collection, and consequently started looking for other solutions.
I still have a soft spot for MiniDisc, the design and ergonomy for its day was really fantastic, and I'm reluctant to sell my last MZ-EH1, but for sound quality, my iBasso DX100 just blows any model away, hell, it even blows the Onkyo Hi-MD decks away!
Technology has just made such a leap forwards since MiniDisc, even Hi-MD era, I really can't understand the enduring praise of MiniDisc.
It's miles better than an iPod, for sure, but add a good portable iDAC/amp combo like the CEntrance HiFi M8 to an iPod, and it's a different story.
It's now ten years since the release of the MZ-RH1, quite some worthy DAP's and even recorders have been released in that time frame.
But to each his own. Just the SQ argument doesn't hold versus MP3 players any more, like it did in the early 2000's.
And the vinyl debate, I mostly agree with JK1; you need a very expensive turntable set-up if you only want to come close to what CD's can do. And the high maintenance, I just gave up. I buy vinyls for collecting, for the cover art, and archiving, the occasional spin when it's just quicker to pick a record from the shelf than choosing from a massive digital collection, but for SQ, no, a good music server and DAC will fare much better.