I have a similar philosophy. I used my ancient Nokia Mobile monochrome phone for like 6 years. I only replaced it because the battery had died and there was no spares. Only then did I decide to get a new phone. The new phone is flashy with a built in GPS but I will likely not replace it until it dies. I have no need to keep buying the latest and greatest. If it does the job then its good.
However trying out a new Browser is not the same. Its free, there is minimal effort to acquire and install and it enhances the perception of what can be done with a browser.
If you don't try, how do you know if it will be better/worse/same than what you are used to now?
My grandfather is the type who refuses to touch a computer because he is satisfied with how he has been doing things for 50 years. He will never know if he could have been doing things better, easier and more enjoyably.
I don't want to end up with that frame of mind so I will try things out and judge them if they are good or not for myself but I will not just ignore new things because I am satisfied with the way I things are now.