This is just my thoughts, backed by only a year of ownership and a lifetime of working on cars.
The limiting factor of brakes is mainly tires, provided all the rest is properly sized.
A T-Bucket is normally very light. Just like other cars in it's weight class (Lotus 7 and copies, Ariel Atoms, other track cars) there is no need for power assist except when the driver has limited function. Dial in a bit more leverage if this is the case.
Adding a booster is not going to increase braking ability, that is a function of the brakes themselves and the rubber and road.
4 inch wide spoke wheels and motorcycle tires won't stop any better with carbon discs, they just lock up sooner, for example.
I get the concern for the ID ten TS sharing the road, but each of us has to determine what our own level of safety and comfort is.
There are modern transport devices with more safety built in. If the point is to get from home to a destination and back without risk, we live in a time where most stuff can be delivered and we can meet with other humans online. You can even get computers involved in transporting you (waymo) if your safety is paramount.
For me, a T-Bucket is a risk I'm willing to take. I'm silly, though, I don't use a safety harness in the shower, don't wear PPE at all times and even sometimes eat food I didn't grow and prepare myself!
I chose to move from a top 20 populous area (3+ million) to a town with under 20K, There were many reasons, but traffic and congestion was one.
