I'm curious to see if the number of companies a person starts has any notable impact. Older entrepreneurs in theory have had multiple endeavors, and failed multiple times, so they either get lucky, or learn from their mistakes.
Plus, more likely to inherit additional funds/property from deceased relatives.
VC money has been falling off trees for the past 7 years and with capital needs to bootstrap something have never been lower. Startup failure because of lack of access to capital is probably as close to a non-issue as possible. It's about conception/planning and execution.