I am really glad I purchased a new bike earlier this year to replace my old POS (that I had owned for about 10 years). The new bike is so much easier to ride with the aluminum frame and larger wheels. The components work properly too .
It’s far more enjoyable to ride, especially on hills. I’m now riding up hills in my middle chain ring whereas previously I’d be chugging along the same hill in the granny gear .

Airshifter, avoid the full sussy unless you want to mostly ride downhills. A front suspension with lockout is what I use.

As for running, well, with the snow and ice covering the sidewalks and trails, the next few months will be pretty much limited to the treadmill in the basement ( ) .