ICINGA 2.9, CompatLogger and Livestatus/Thruk

In ICINGA 2.9 Compatlogger is deprecated.
Do only historical logs by LIVESTATUS Listener and THRUK are deprecated also ?
THRUK works fine without that functionnality ?

Yes, Thruk works fine without historical data if you don’t need any logs, notification history, alert history and such things.
There is an experimental import for the ido database (see https://thruk.org/documentation/logfile-cache.html#ido-import) It works, but IDO does not contain all the information of the compat log. See the documenation link for caveats and how to set it up.