Why must people assume that 'upgrading' their website is always an improvement?

Perhaps I'm just a stick-in-the-mud, but I tend to prefer old formats. Like when Excite.com (my favorite search engine before Google) changed format, I left them. And just recently my web email provider "upgraded" to a bandwidth hogging, Java-script heavy format with built-in AOL instant messaging. (Still deciding whether I will stay or not. Changing an email account is such a pain.)
I will admit there were several things about the old forum I did not like. Among them, I missed being able to use an avatar, smilies, and all the traditional BBCODEs.
But as Francisco mentioned, the in-message images are broken. Also, I do
not like the way the
Recent Posts list is formatted. I much prefer the old option where we could sort by Recent Threads, instead of post by post.
I would imagine the broken images will get fixed. (I see that Simple Machines inserted extra characters into the image addresses.) But I will miss the nice, clean, minimalist look of the old forum.