My guess is we have about a month wait for 1.19 after 1.18. They shown us pics of content in 1.19 about 5 weeks ago, armor for the jobs about 7-8 weeks ago... so my guess is 1.18 will be released, then 1.19 will be in testing a few weeks after.

They said 1.20 would be out by the end of summer(September to be exact) so chances are they are expecting a major update a month.