I'd like to find the person who decided that an AVR's lifespan should be 4.5 years and bitch-slap him. There are receivers that were made in the 70's and 80's that are still in operation (hell, they're collector's items now).
Older AVRs had fewer channels for amplification, more heat sinking area, more robust power supplies..
The receiver buyer today is pressing for lower prices and the brands responded by taking out the internal component overdesign.
They also had less to go wrong. And there was no need for specialized equipment to swap out a component on the board. If the DSP chip was socketed instead of soldered on to the board, I'd have bought a replacement and installed it myself.
Once again to build a product with lower FOB pricing as requested by the market, more ICs, more surface mount components are used, robotic assembly machines are used. Today when a receiver fails, the technician simply swaps out the PCB modules. Socketing a DSP will cost more but again just plugging in a replacement DSP could be done provided it has been
preloaded with the OE proprietary firmware.
My experience so far has convinced me that I'm not going to pay more than $500 for the damned things now. Which conveniently works out to be the price of the RX-V585, which I purchased a few days ago. If I do manage to get the RX-V673 (I couldn't even get confirmation that the replacement board would be shipped with the "D" model of the chip), I'd probably redeploy it in my brother's bar or something. 8 years old? The damned thing looks like I just took it out of the box...
Today...
If a receiver fails and is more than 4/5 years old, it is quite possible no replacement PCB modules are available. The receiver is out of warranty and few consumers will accept the cost for the replacement PCB module, plus bench tech labor to install. And even if the PCB module is available, the market continues to push for the latest/greatest audio, video and connectivity, surround and HD technology/features. A quick scan of Craig's list and/or E-Bay will disclose a significant inventory of dated, but working AVRs being sold for up to 75% off from its original pricing....
IMHO..
The AVR products today for the most part are a price-point commodity.... Almost a throw away..
That could possibly change...
But then the buying market has to be prepared to pay for higher pricing. Note that some of the pricing also has to do with our national politics, the China import sanctions and our failure to approve the TPP agreement had an impact for increasing/raising AVR(and other CE products) pricing sold in the USA by about 25%..
Just my $0.02...