SVG feels much like HTML to me, especially when animations are involved: on the first sight it is quite nice and simple, does its job well, can be handled by fairly basic viewers (as well as converters, editors) and generated easily. Then there are even more features with CSS and JS, which also look neat, but then simplicity goes away, along with it goes the wide support of full functionality, and compatibility (due to partial support, unexpected behaviors in different contexts). It still looks like a fine option when animations are needed, but I would rather avoid those in SVG when they are not necessary.