Yes you're right, many years ago the first version EOS100's did have some issues but they have been resolved over time.
The EOS150 has developed through a series of design upgrades up to the current highly refined 2020 model. EOS is always improving and innovating and I find that a real plus point. I have the 2018 model and it has proven to be flawless.
To demonstrate EOS' commitment to the sport there is a 4-stroke (Quattro) approaching release and that will be a ppg game changer, offering smooth, linear power and maintaining the same light weight criteria.
Everybody has brand loyalty to some extent, (some will even buy motors that virtually guarantee cracked exhausts at some point)!!! I would trust actual hands-on testing rather than hearsay and make your own judgement. I've lost count of the number of motors I tried on before arriving at the EOS150! Good luck whatever you decide.