harrytodorov
Whereas in the case of KeepassXC, you have to have your own place where to store the password database and set it up on you different devices. So Bitwarden offers more convenience.
A helpful resource for me, personally, was the educational ray tracer "Nori" [2], which came with 5 assignments covering fundamentals of a ray-tracing system (intersection acceleration, Monte Carlo sampling, basic and advanced integrators, BRDFs, even microfacet material models). Assignments gave hints on how to integrate those features in the ray tracer, plus they provided ways to validate ray-traced results. Currently, the assignments are removed from the Nori's website, but one can find them using the Wayback Machine.
[1] "Ray Tracing from the Ground Up", by Kevin Suffern, September 2007, http://www.raytracegroundup.com/
[2] Nori: an educational ray tracer, Dr. Wenzel Jakob, https://wjakob.github.io/nori/# (using Wayback machine to access assignments https://web.archive.org/web/20200110040505/https://wjakob.gi...)
I'm pretty sure your statement is somewhat paradoxical :)