More parts equal more points where something can fail. I don't think where the motor is mounted has much to do with it.
For me, ease of blade changes is a top priority. I had a little AMT cast iron saw for many years, and it never had an issue. I bought a used RBI Hawk and refurbished and upgraded it. It didn't cut any better than the AMT but had a larger capacity. Then I saw a video demonstrating how easy it was to change the blades in an EX-21, and I had to have one. I found a used EX-21 and loved it. So, if I have to rebuild the saw every couple of years, that's OK with me. I now have an EX-21 and Pegas. The Hawk and the AMT saws are long gone.