My approach with tape decks has been to buy ahead of time all the parts that may(?) go unexpectedly.
With the MX-80 I picked up last year, I already have just about everything double except for the heads and a few odds and ends.
With the G-16 I've had for over 20 years now, it's actually never broken down (knock on wood), but I had spare parts and not too long ago picked up a second G-16 cheap, just in case I needed a motor or a spare card...etc.
In the typical home/project studio...if you start off with a healthy machine, and some basic spare parts, and maintain it...odds are it will run for a very long time before it kicks. Now, there are some great old tape decks that simply had issues from almost the beginning, with relays and things that would break down all the time...but that's a different thing.
I was assisting at a studio back in the mid-late '90's, where they had a sweet old Neve console and an MCI 2"....and that tape deck was blowing something regularly as the machine got hot (I forget what part it was)....that they emptied out all the local Radio Shacks of their parts....but the session didn't stop any longer than to pop in another spare, while the artist stepped out for another smoke.
Now, you want talk about near-death moments...imagine your DAW completely shits the bed during a session and/or you get some meaningless file errors. Unless you've been doing religious backups....Radio Shack will NOT have any parts that will help you dig out of that hole.
I use my tape decks and my DAW side-by side....but honestly (and this has nothing to do with analog VS digital stuff)...when I'm just tracking to tape and the DAW is silent and powered down, I rarely have any "SHIT!" moments...though working in the DAW there always something that needs a kick in the ass. Usually it's nothing terminal...but computers have a way of occasionally "making a decision" for you, or "fighting" you on your decision.
