I’ve taken my eye off this topic for a bit and it’s gone a long way. I think people misunderstood my original post.
I said “Bear in mind that anyone who has chassidish mesorah, it cannot be more than 250 years old, going back to ashkenaz doesn’t seem so bad”
Ubiquitin replied “Every minhag is “only” x number of years old.”
The big difference is, That minhag Ashkenaz goes back almost unchanged to the period of the Rishonim and Chassidei Ashkenaz. It still follows the Maharil which is even older than the Rema, who the “Litvish” mesorah is based on before the Gra. The “Yekkisch Mesauroh” which is over 1,000 years old, is rivalled only by Sefardim in Syria and Persia/Iran and the Teimanim/Yemenites whose tradition is even older.
Any changes in Tefilla or hanhogos in mitzvos which were initiated by the chassidim, were mainly, if not totally, al pi sod (Kabbalistic), and were not practiced by the tzibbur at the time of the rishonim.