Updates Stability?

Hi, I appreciate all that the open source woocommerce team does to maintain such as growing plugin but at what stage is the plugin considered to play nicely with the majority of themes as the plugin with its own database seems almost independent.

The reason for asking is that we are currently helping a company that has an outdated theme and whilst the WC updates had been going smoothly for a couple of years, it is a concern that looking at the update logs from WC there appear to be a growing number of changes, that are then either reverted back to the previous version, patched, fixed again, and reverted back.. It’s enough to make your head spin, but there are a few security updates that might be crucial and worth updating the database? Or just leave as is, as if it’s not broke don’t fix it, but at some point security may become necessary or highly advised? What are your thoughts? Leave any updates as product management and orders work ok or ??

Currently –

WC Version: 8.9.3 – But could upgrade to latest 9.6.1?
REST API Version: 8.9.3
Action Scheduler Version: 3.7.4
WP Version: 6.6.2 But could update to latest now some bugs are fixed.
Beaver Builder Theme

Child Theme – yes
Parent Theme Version: 1.7.6.2 – Very oudated (not our choice)

All seems to work fine with one Critical repeating error – site details replaced with xxxxx’s for illustration.

CRITICAL Uncaught Error: Call to a member function get_customer_id() on null in /home/xxxxxxxxx/public_html/wp-content/plugins/woocommerce-catalog-visibility-options/lib/woocommerce-catalog-restrictions/classes/class-wc-catalog-restrictions-query.php:166 CONTEXT: {“error”:{“type”:1,”file”:”\/home\/xxxxxxxx\/web\/xxxxxxxx\/public_html\/wp-content\/plugins\/woocommerce-catalog-visibility-options\/lib\/woocommerce-catalog-restrictions\/classes\/class-wc-catalog-restrictions-query.php”,”line”:166},”backtrace”:[“”,”#0 \/home\/xxxxxxxx\/web\/xxxxxxxx\/public_html\/wp-content\/plugins\/woocommerce-catalog-visibility-options\/lib\/woocommerce-catalog-restrictions\/classes\/class-wc-catalog-restrictions-query.php(63): WC_Catalog_Restrictions_Query->get_cached_exclusions()”,”#1 \/home\/xxxxxxxx\/web\/xxxxxxx\/public_html\/wp-includes\/class-wp-hook.php(324): WC_Catalog_Restrictions_Query->taxonomy_filter()”,”#2 \/home\/xxxxxx\/web\/xxxxxxxxx\/public_html\/wp-includes\/plugin.php(205): WP_Hook->apply_filters()”,”#3 \/home\/xxxxxxx\/web\/\xxxxxxx/public_html\/wp-includes\/class-wp-term-query.php(411): apply_filters()”,”#4 \/home\/xxxxxx/web\/xxxxx\/public_html\/wp-includes\/class-wp-term-query.php(311): WP_Term_Query->get_terms()”,”#5 \/home\/xxxxxx\/web\/xxxxxxxx]}

Thanks in advance for your suggestions.