And if the new tech is beneficial and adds enough value that it makes it worth replacing the old tech, then by all means go for it.

However, I can't count many companies I've seen decide to get into "the cloud" only to do lift-and-shifts and are now running their stack in slower and more expensive ways.

There's a reason this youtube video exists and it's because people get into hype and then are saddled with technical debt: https://www.youtube.com/watch?v=b2F-DItXtZs

Over the last decade I worked for a fintech that did analytics for the investment banking industry and between 2016-2020 the amount of people that were shocked we weren't trying to shove blockchain somewhere was surreal.