Well, alrighty then....
Moving forward... more modern times is "Elastic Stack", featuring "Beats" more prominently than the infamously pita Logstash. Also known as ELKB. Or at least to a feeble pivot effort by marketing.... Reality is more likely to be EFK, Elasticsearch, Fluendo, Kibana.
Time series data side: Prometheus and Loki seem very attractive combo, visualized via Grafana. Loki design document (draft) here: https://docs.google.com/document/d/11tjK_lvp1-SVsFZjgOTr1vV3-q6vBAsZYIQ5ZeYBkyM/view#heading=h.xmomb5buwgxj
I am curious as to the thoughts of the greater mind hive?
Elastic Stack: Beats may be a modular blast but you still need Logstash for any "manipulations". Be that as it may, you still end up with full text searchable logs. JVM and fiends (typo not intended but apropos?) are going to chew up as much RAM as you can throw at it. CPU cycles as well. So, big enterprise and big hardware kind of deal. Elastic Ph.D. requisite.
Loki: Give up log content for a meta data approach. Substantially less resource provisioning requirements. Hence more affordable/cost effective small to medium biz/enterprise side? High bar of entry learning curve wise since this is complex 'chit but still much lower bar than Elastic Stack. Keeping w/analogy, yer' maybe gonna' need a Bachelor's fer' this one.
Alrighty then... inquiring minds are curious about such things. Let 'er buck!