How are people charging Li/LA hybrid setups?

[Ryban]

I see a lot of talk about people keeping lead acid around for their start bank, and switching to LiFePO4 for the house bank, but I'm still a little confused on how people are charging these setups efficiently, given the different requirements of the chemistries.

Are people using DC-DC chargers for each bank, or manually switching between the banks to top up the start bank as needed?

Currently I have an ACR in my all lead acid setup so I never have to think about it, but I will be switching to Lithium soon.

I like the idea of just switching everything to Lithium, but people seem to have strong opinions about that.