OK, my response to the OP’s question: Are expensive PCPs worth it?
Answer: It is highly dependent on your Use Case for the rifle. Generally, I’d say they are not worth it. The law of diminishing returns certainly applies to PCPs.
Rationale for answer: If your use case is competition shooting and you require the highest accuracy and performance available, then an expensive PCP may be “worth it” to achieve your goals.
If your use case is backyard plinking or pesting or squirrel hunting, then the performance, accuracy and reliability of many modestly priced PCPs will be more than adequate.
Support for rationale: I must have 15+ “expensive“ PCPs (FX, Daystate, RTI, Taipan, Weihrauch, etc.). My 1st PCP was a .177 Umarex Gauntlet. I still have it. I paid $199 for it from Pyramyd Air.
I filled it with a $50 hand pump from eBay. I still have it. The regulator and hammer spring are NOT adjustable. It shoots inexpensive Crosman Premier 10.5g domes amazingly well. It has still never leaked. In 2023 I put a Sightron target scope on it one afternoon and shot consecutive Thirty Yard Challenge cards of 198, 196, 197 with the $199 rifle and Wal*Mart pellets. The 10-ring on the TYC target is .125” (1/8”) diameter.
How much more accurate is a PCP costing 10x more ($2,000) than my .177 Gauntlet going to be - and do you absolutely require higher performance? Very diminishing returns here...
Summary: Expensive items such as PCP air rifles, cameras, cell phones, watches, autos, etc are “worth it” if you get the level of enjoyment that you were hoping for… but they are often not “worth it” from a pure performance perspective.
Just the opinion of a guy who now has so many PCPs that he has lost count (truth).. but who is enjoying the heck out of them, lol - so “worth it” to me.
-Ed