In my opinion solid axle hubs don't deform like quick releases do so there is no need to leave a bit of play off the bike.
Not just an opinion, an actual science fact. There is no end to end compression of the axle with track nuts, whereas a good QR can put about a ton of pressure on the axle, so it's no wonder it compresses a bit, pushing the cones together and taking up the bearing free play.
Not just an opinion, an actual science fact. There is no end to end compression of the axle with track nuts, whereas a good QR can put about a ton of pressure on the axle, so it's no wonder it compresses a bit, pushing the cones together and taking up the bearing free play.