My aunt had 4. During her fourth pregnancy her organs fussed to her ovaries, but idk if that was c section related.
I had three and this will be my forth and last one because the more you get the more it hurts after!
I know here in TX, most doctors will not go past 3 c sections.
I wouldn't take any advice from the Duggars personally. The scar tissue that develops after each incision increases your risk of uterine rupture so it does become more dangerous over time. Most doctors say that 4 or 5 c-sections is the limit for what they're comfortable with - over that it's just too risky.
Look up Michelle duggars pregnancies! She has has like 20 kids and alot of those were c section. Its mainline your body handles it