It's a big topic, and (as you might expect) there are no easy answers.
Maybe the most important is to briefly tell them there are alternatives you prefer, and why you prefer them.
People will probably stick to whatever they were using, but letting them know about alternatives is a really good first step.
If they later also hear from someone else about these alternatives, and later maybe from a third person too... well, at that point they may actually consider switching 👍