Hi guys,
The story with kite companies releasing new kites every year is not necessarily for you to have to upgrade every year. The newer kites are a progression in design so each year, the latest developments are released to the market. You shouldn't need to upgrade your kites for at least two years.
The every year upgrades are for people new to the brand or model, coming from another brand. It is the kiting community that feels the need to upgrade each year, it has nothing to do with the kite companies. No one is saying you wont be able to ride without having the latest gear or that old gear is obsolete (except Best with the Hellfish

[}:)]).
There are rarely "significant" improvements from the top companies as each new model gets refined. Also depends on how you scale significant. If you are a designer and have been bugged for years about how to remove something as small as a bit of flutter from a wingtip and you finally manage it, then this to them, could be a significant improvement, whereas consumers may see significant as the change in windrange from "C" kites to bridled hybrids as significant.
It's all in your mind. Be happy with what you have and demo new gear if you aren't. If you feel the improvements are significantly better and that the price to upgrade is worth it, then do so, otherwise, stick with what you have.
DM