Dead End
An addressable market of $55billion? Pull the other one, it's got bells on. Xilinx were pulling in revenues of just over $3billion until they were bought by AMD, and I doubt Altera under Intel's stewardship has reversed their trailing market position. I'd be stunned if between them they were pulling in more than $7billion revenue.
The reason why there's an inventory correction going on is, I think, that a certain amount of AI Kool-Aid was drunk concerning FPGA's role in tech's latest bubble.
One really hard question both Xilinx and Altera have to face is, just how big is the market really? Taping out a new part these days is a very expensive business. To get a large complex part in production on the best silicon process is several $billions these days. I don't think the FPGA market is too far from the point where the cost of production set up exceeds the total market size. Xilinx, being part of AMD, is perhaps a bit immune in that AMD has some weight to exploit when it comes to getting time on TSMC's fabs. An newly independent Altera could really struggle. It feels to me like the whole technology is edging towards being unsustainable in the market place.
We shouldn't be surprpised if that happens. It's happened plenty of times before. There's many a useful / niche technology that's not been able to fund upgrades, and have been swamped by alternative technologies that enjoy the mass market appeal. Anyone remember Fibre Channel? Serial RapidIO? Both replaced by Ethernet.
FPGAs are troublesome, difficult, hard to program for, worst-of-all-worlds devices, the kind of thing one uses only if one absolutely has to. Thing is, there simply isn't that many such roles left where they're actually necessary. CPUs are very capable, and if for some reason the performance of many CPU cores all featuring their own SIMD / Vector units isn't enough, it's pretty simple to plug in a few teraflops of GPU. Even for the highly vaunted "they're good for radio" type work, FPGAs are often used simply to pipe raw signal data to / from a CPU where the hard work is done. I've seen projects go from blends of FPGA / CPU to just CPU, because the workload for which an FPGA was well suited is now a fraction of a CPU core's worth of compute. And with radio standards like 5G being engineered specifically to be readily implemented on commodity CPU hardware, the future looks bleaker not brighter.
At the lower end of the market, the problem is that it's actually pretty cheap to get low-spec ASICs made (if you're after millions). So, even if used in lower-tech devices FPGAs will struggle because if the product they're used in is successful in the mass market, it's worth ditching the FPGA and getting an ASIC made instead and making more money. So, FPGAs are useful only to product lines that are not run-away successes; doesn't sound like the kind of product line that's going to return $billions.