I used to use this as well (with site-specific part in the middle, not as a suffix) but then switched to Bitwarden and random passwords as some suffixes were no

I used to use this as well (with site-specific part in the middle, not as a suffix) but then switched to Bitwarden and random passwords as some suffixes were not unique and with 300+ services it started being annoying to type over and over again. Also a more sophisticated attacker could intercept two passwords and see the similarity, then bruteforce just the difference.