Typical CRT flicker was pretty subtle, especially at high refresh rates. It becomes more pronounced at low refresh rates, or simply bad monitors.
Making a silly effect on a website to evoke a nostalgic feeling doesn't really have to be accurate, and it'd probably be near-impossible to accurately represent the subtleties of a CRT display without compounding them with the subtleties of LCDs, especially so when the LCDs an end user will be using is an unknown.
Making a silly effect on a website to evoke a nostalgic feeling doesn't really have to be accurate, and it'd probably be near-impossible to accurately represent the subtleties of a CRT display without compounding them with the subtleties of LCDs, especially so when the LCDs an end user will be using is an unknown.