Is this a US/SV thing? I hear it here over and over but in 20+ years of professional development (Europe + US/Canada remote start ups) never I needed more than a week to start working on a system (usually is 1-2 days that are mixed with onboarding sessions as well).

I may not be able to refactor the system to use micro services or whatnot, but to dig into the code and start fixing some bugs or even add a small feature has always been a week 1 goal for me (and one I set to the people I manage now).