We look at things differently. First, if the Sprog failed then why would I want to get another one that will fail? Second, my income is a government pension. $100 may be nothing to you but it is a significant cost for me. Actually, given the circumstances I shouldn't have this hobby at all.
And I think the Sprog is reliable so I've experimented some more. I downloaded and installed latest JMRI, I used a different USB cable just in case, and I rebuilt the roster for three locomotives.
The power supply for the Sprog is 12v. The motors are 12v but Sprog runs trains a bit slow, the E94 is the worst of all and still unusable. The Elite has a 15v supply and everything runs at good speed, even the E94. Sprog website says power supply can be 12-15v so I'll try a higher voltage supply with the Sprog.
If I were to get another Sprog it would be Sprog 3 with built-in booster. I like running trains from my Android tablet through JMRI on the laptop but so far it usually has been a hassle.
Anyway, the E94 runs well and makes noises.