There is probably a very straightforward answer, but I'm having trouble with it.
Helm is only showing the last 10 revisions if the --max flag value provided is greater than 10. Does helm only store the last 10 revisions?
$ helm history airflow --max 256 -o table
REVISION UPDATED STATUS CHART APP VERSION DESCRIPTION
76 Thu Oct 1 12:52:51 2020 pending-upgrade airflow-7.9.0 1.10.12 Preparing upgrade
77 Thu Oct 1 16:01:55 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
78 Thu Oct 1 16:02:52 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
79 Thu Oct 1 16:32:53 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
80 Thu Oct 1 16:52:51 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
81 Fri Oct 2 11:06:38 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
82 Fri Oct 2 11:08:56 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
83 Fri Oct 2 11:16:41 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
84 Fri Oct 2 11:25:19 2020 superseded airflow-7.9.0 1.10.12 Upgrade complete
85 Fri Oct 2 12:07:29 2020 deployed airflow-7.9.0 1.10.12 Upgrade completeThe default saved history len is 10 (starting Helm3). The flag is only available in helm upgrade (dunno why they didn't add to install too):
$ helm upgrade --help | grep history-max
--history-max int limit the maximum number of revisions saved per release. Use 0 for no limit (default 10)