I am going to give you some changes, These by themselves are not major but as a whole are very differnet
People had chickens and went to the local shochet to slaughter them and they kashed them, themselves.Today people go to the supermarket and buy pre-packaged chicken
Eating at a restaurant, Buying premade food from Meal mart or just catering did not really exist. People cooked for simchas themselves
Weddings many times occured Friday Afternoon (except in Krakow) so the Seudas Mitzvah was also the Friday night meal (Money was tight)
People rarely travelled outside their immediate areas especially for a short time, Today travelling is a regular thing and has its own issues.
You really have to admit that its differnet living in a small Shtel vs living in Brooklyn, Its a very different style of living.
LIving in the US or Israel is not the same as living in Lithiuania or Russia/Ukraine
Most people do not live in an agrarian society and live in Urban areas and the living is different
None of these things makes anyone more or less religious, Just a different lifestyle and as a whole would look very different to someone from the 19th century Shtetl