The best replacement for multipath is udev.

The best alternatives to multipath are rated as following:
★★★★★  udev
★★★★  multihop
★★★★  rdac
★★★  powerpath

Your alternative for multipath is not listed? Suggest!
Speaking about multipath, one probably shouldn't forget about iscsi.

Other search terms related to multipath and their ratings are:
★★★★★ iscsi
★★ lvm
You have in mind a companion for multipath and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of multipath in all years. Click on graph for more.
multipath
udev
multihop