Medicine still works in europe and is also being developed in europe. Maybe look at how the EU/european countries do it? A lot of it is having regulations. The free market isn’t free if the choice between getting the product or not is the difference between life and death.
I have not tried it myself but I found a paper that compares i2p to tor for latency/bandwidth. https://www.freehaven.net/anonbib/cache/ehlert2011:usability-comparison-i2p-tor.pdf