Triplex pump vs. axial cam — which should I buy?

Specialist-subreddit consensus is that triplex (or 'AAA Industrial Triplex'/CAT) pumps are rebuildable, run cooler, and last longer under heavy use, while axial cam pumps are cheaper and fine for occasional homeowner duty. Several r/pressurewashing threads warn that some AAA pumps fail prematurely, so reviewers recommend the higher-tier CAT or triplex pumps if you plan to use the unit weekly.