sous vide producing inedible food because of fat not rendered

Sous vide is simply a tool. It's not the correct one for every job. Rendering fat is generally a problem because of the low temperatures used. What was the final result you had in mind? If you want "traditional" ribs, then the best way to cook them is traditionally. Google will reveal multiple sources, try Chefsteps and Serious Eats for starters.

For fast tender cook, I prefer a covered Dutch Oven with water containing a small grill to raise it above the water after a 500'F searing Broil then cover and reduce temp to 325F for slow covered or normal open top. Either way the humidity from right amount of water improves heat transfer like forced air for cooking and regulates as a heat sink for a lowering bottom side cooking temp and allows for drippings to be collected and retains moisture.

Almost as consistent as Sous Vide with practice but not quite the same. Better in some cases if fatty like a Turkey covered in foil except for browning. Then cook steaks less than required Med-Rare vs med. or Rare vs Med-Rare etc adjust up by temperature warming covered in oven if prepared ahead of eating time to keep warm and allow for change.

High humidity speeds up the cooking time in a sealed oven and sealed product with a drip pan with water.

But I think Broil/Sear then slow cook is perhaps most convenient for me in a well insulated low temp sealed cooker over water or outdoor BBQ.

But a fast Broil and Pressure cooker works well too but timing takes practice with thickness.

Certain flavours require the elevated searing temperatures. Then add seasoning just before the end of cooking to retain freshness/strength. You won't need as much.

Sous vide can deliver fantastic ribs.
Fats should render at temps between 130-140, so you were not eating the raw fat - just too much of it.

I think there are 3 main issues to check:

• What’s the quality of your meat? If you have a lean cut of ribs, you wouldn’t have experienced the fatty issue you described. A local ribs place we went to had super fatty ribs, and they were delicious. At my local market, all I could get had probably half as much, and they would finish much dryer.

• Searing: Maybe 5 min wasn’t enough? More sear (or higher temp) on the fatty side would crisp it up more and cause some excess to drip off.

• Taste: we all have personal prefs - the fatty cuts at our resto often tasted too fatty, like you described (they were prepared in a smoker for 6 hours), but damn, they were good eating. My dryer ribs went down easy, but were not quite as satisfying.

I just made sous vide ribs this weekend. Looking at several recipes, I settled on 150 degrees for 24 hours. Since I also wanted to cook a pork butt roast at the same time (and the suggested temp I found for that was 160 degrees for 24 hours, I settled on doing both for 24 hours at 155. Then I refrigerated the ribs and roast for 12 hours, pulled them out to room temp, and indirect smoked them on a weber with the grill temp staying between 190 and 210 for 45 minutes. The ribs turned out almost perfect - maybe slightly dry - but fall of the bone tender. The roast however still had more fat on it than I like. Tender as you like, but i had to take a long time separating out fat deposits. Next time I'm going to try a higher temp for the roast, but the ribs were great at 155 and maybe a little better at 150.

Hope that helps!