What comes to my mind in relation to Lionel tubular track ... "If it ain't broke, don't fix it" -- i.e., with another track system. My L-shaped layout has Lionel O-gauge tubular track and tubular track O42 switches on its main level and O27 tracks on its upper level for three short trolley lines. It works for me ... although other hobbyists have their own preferences. Beauty (of trackwork) is in the eye of the owner.
Mike Mottler LCCA 12394