DW20 includes Steve's Carts for this reason, but that mod is problematic in other ways. Third, it does nothing with the carts beyond transportation.
This would not normally be an issue, but pipes do not require a whole industrial base (coke oven, engine, rolling machine) to make. Second, it makes getting rails more difficult. Forget riding the carts, chunk load errors abound at high rates of speed and high speed rail isn't (servers don't tend to load chunks that quickly).
The first and most glaring issue of Railcraft is that its principal reason for being, making rails and carts more useful, was rendered obsolete a long time ago with the addition of pipes (and more recently, tesseracts). As it stands I can only comment on Railcraft in context of the DW20 modpack. I wish Traincraft was in more than just one modpack.
