Reply To: I'm gonna marry a feminist yekke girl

Bein seuda l’seuda is obviously governed by local convention and not halakha. Halakha does not tell you when to eat your meals. Rama says that in Poland, they only waited one hour and the whole inyan is to not eat meat and dairy in the same meal. He maintains that, according to the letter of the law, one may eat a meat meal, recite Birkat Hamazon and then immediately begin a dairy meal. While the minhag developed to wait some period of time, this is just a minhag . In addition, it is noteworthy that the Rambam says one should wait about 5.5 hours, not 6 hours, which leads some to say that 5 and a half hours suffices. There is obviously much diversity on this matter, which results from the fact that there are little, if any, actual halakhic requirements.

The above is not correct. You are still confusing the shittos. There is a machlokes rishonim whether bein seudah l’seudah is physical seudos or an amount of time, ie. 6 hours.

Rema paskens like the first one, but notes a minhag to wait 1 hour anyway. He ultimately notes that the proper ashkenazic minhag is to wait 6 hours like the second shitta. (89:1 see taz, shach ad locum)

It is not obvious at all that local custom (nor avi weiss custom) plays any part, and is also incorrect.

If you are interested in sephardic minhagim, you are required to wait 6 hours min hadin it would appear, since the mechaber paskens like the second shitta that bein seudah l’seudah is an amount of time, ie. 6 hours.