Conrail was split between CSX and Norfolk Southern almost 20 years ago. Both Class I railroads have done well with the former Conrail lines.
It’s been fifteen years. What’s been proven, of course, is that there was no need for Conrail in the first place; the regulations and taxation needed to be cut back, which was done somewhat with the Staggers Act, but notwithstanding, Conrail continued to exist for nineteen years after that, cutting and cutting their way to “profitability” (when private companies would have become profitable far sooner).