Is there an easy way to automatically upgrade trains and/or bots with the newer versions? At least for bots I can hack a solution together by requesting the old ones to a roboport and then pulling them out with an inserter, though the port can still get clogged with other bots.

For trains, I remember using this train upgrader mod (https://mods.factorio.com/mod/train-upgrader) in the past, but looks like it doesn't work for 2.0. Anyone got a solution?

2.1 made it possible to upgrade trains with an upgrade planner, so the plan there is to just make Nullius 2.1 compatible. I believe that 2.0 also added some options that give you more control over bots and give you an easier way to replace them.

Thanks! Is there a timescale for 2.1 compatibility, and if so is it expected to be backwards compatible with my 2.0 save? Wondering if I should just bit the bullet and force move all my trains somewhere for mass manual upgrading (approx 300 now tho :D)

It's expected to be backward compatible.

Thanks!