Over time the definition of "current" and "legacy" needs to move forwards and the decision to bump legacy to 340.xx was deliberated by the team for a long time (we postponed it for 7.0 but agreed on 8.0). The change impacts our support for cards that are typically a decade (or more) old as the newer cards supported by 304.xx are also supported by 340.xx. The decision will stand regardless of your poll and if you are determined to use your ancient card (and need RAID support in the kernel) the solution is to self-build an LE image with the bits you need; as nVidia maintains their drivers aganst new kernels it's a fairly simple change to revert.
If there are a group of users that need 304.xx support the solution is for you to group together and support each other; someone can build an image using the older driver and share it to the group. This is what happened when a group of ION users wanted 340.xx support to solve some graphical images at the time we still used 304.xx. If someone wants to step up/forward as that builder we're quite happy to support the effort with some hosting space to publish the builds from, if that's easier than sharing via dropbox/mega/etc.