I thought I would update this thread, particularly for the possible benefit of anyone thinking of tracking SID, but hesitant to do so.
About 3 weeks ago, I decided to add a 2nd installation of LMDE to my computer, this one tracking SID. Just as an experiment and learning experience. I expected breakages. Things went much smoother than I expected, and I had no breakages or hickups of any sort, doing all the daily updates (there were lots of updates 15-30 daily?). Everthing worked as it should.
Last Monday, update through synaptic reported that there were a very large amount of updates coming through. I believe something like 180+, and it appreared to my linux novice brain, that lots of seemingly important stuff was to be removed (Gnome, x-org, et).
As this was supposed to be a learning experience, I just went ahead and did all the updates, and sure enough, I broke my OS.
Fist lesson learned.
I learned to TRUST what synaptic said it was going to do.
I had made a clone with clonzilla (a very important tool to learn to use, quite easy once used a couple of times). I was back up and running in about 10-15 minutes.
Here is the 2nd lesson learned.
Every day since then I checked the updates, but held off till today, when I saw that updating was NOT going to remove anything important. I took a chance and updated everything (still lots of updates). Nothing broke, all is well.
The lesson learned is just to hold off on updates, if you see something suspicious. The problems get sorted out, if your just patient and wait a few days.
3rd Lesson learned.
SID is not all that much more maintenace than testing. You just have to be more patient. When SID breaks it breaks big time. KEEP A CLONE copy!
If your interested in trying it yourself. Just give it a go. It is a rewarding experience, and you have most of the latest sofware.