I wonder how many decades the advice “use WP-cache; WP-supercache” has endured. Is it still the advice? Why knows. It’s been 20 years of WP (last week) and seei

I wonder how many decades the advice “use WP-cache; WP-supercache” has endured. Is it still the advice? Why knows. It’s been 20 years of WP (last week) and seeing that error message.