Having dissected many of these ratchets, I think the SS ratchets weakness is in the high profile 36 toothed gear and the two teeth per side pawl engagement. In my opinion, the way those two pieces mated was awkward. Couple that with being shipped with minimal to nil lubrication didn't help matters. Plus, repair kits were rare, even for the time they were released, and they didn't include the selector & pawl, which were 1 piece mated together. Any issues there meant Sears had to fully replace the ratchet.
You can get these things running more effectively with a good lubricant. From my experience Super Lube really helps with mechanism engagement and quiets them down considerably. However, due to the design, you'll have to keep an eye out on contaminants entering your mechanism system and the condition/quantity of lubricant remaining over time.
I'm not saying these are absolute garbage. I'm not saying everyone hated them either. You have to accept the issues when deciding to own or use them. In a way these remind me of Jaguars in the early 2000s and below. Some of them look great, but you have to accept you may have mechanical/electrical issues with your car. It is the quirk of the brand for the vintage.
With the myriad of issues, the high expense of the repair kits Sears had to absorb, and Easco being sued over patent infringement, things didn't look good for either the SS or Lifetime ratchets. In the video, I compared the SS/Lifetime ratchets to the Premium Grade Craftsman ratchets. Both were very expensive for their time, both had issues depending on the circumstances, had availability/warranty procurement issues, and repair kits were rare.
Whether DIY or professional, people vote with their dollars on what gives them the best perceived value. Unfortunately, the SS/Lifetime ratchets didn't make the cut.