IITFT
“there have been adjustments in Jewish practice over the centuries”
Exactly!
Thats why when people say things like ” default, traditional manner of being frum” is demonstrably false.
This is of course nonsense. He wouldnt understand the language, He’d be confused why people are wearing furry hats on their heads. He’d want to know where the Mishkan/Beis hamikdash was. not to mention Why Torah She bal peh was written down.
I could go on and on. What happened to Techeiles? PAra Adumah? Metzorah? Yibum? Instead we have Chanukah which didn’t exist in the time of Tanach. Simchas torah didnt exist during the Gemara. IITFT listed some other examples. There are Dozens of other more recent changes upsherin, shlisel chalah and more recently Chanukah presents. Not to mention hashkafic innovations like mass learning for everybody which I think all acknowledge is a recent innovation (Though perhaps a neccesary one due to eis lassos).