Are there any super capacitors based batterys which emulate a LiIon which won't bloat but will still act as a battery for intermittent high drain situation?
Charge level control for such devices should be standard. All my always connected devices with LiPo batteries have led to eventual bloating and safety hazards.
GNSS-SDR is a decently usable software. We use it regularly in our lab with low-cost and medium cost SDRs like Pluto, USRP B series boards (modded with .5 ppm TCXOs). Configuring it for a 15 channel GPS + Galieo L1-band receiver, the CPU usage remains at 120% or so.
If you really want to experience rallying I would recommend driving one of the modern road going rally inspired cars like the Lancer EVO / WRX STI / GR Yaris. They handle like no other, and will push the casual driver to their limits much before the car reaches its limits. Also turbo lag is fun.