Possibly. It depends on how many fuses the fuse maker is able to produce. To further the logistics/sourcing issue, I ordered ONE specific size Isoclean fuse from a reseller. He did not have it in stock and had to go to his distributor who responded with "we have no idea when we are going to get another shipment from Isoclean". He then offered me the option to wait (could be 2 weeks, could be 6 weeks...?) or to get a Hi-Fi Tuning fuse at the same price.
Another time, I had tried to order 8 Synergistic fuses of a specific size and the reseller just did not carry that many at a time in stock. I had to wait for Synergistic to finish their production run before I got the order shipped.
Now try ordering 50 fuses of a certain type? 100 fuses? You could be stuck waiting 2-3 months for a production run to get your amps out the door. The Little Fuse / Buss are available anywhere/everywhere right now (or just order from Digikey’s stock of 2,000+). The alternative is to try to mass order a huge number of fuses from the fuse maker. This could overload them as they may not have the tooling to put out that many and still provide all current distributors/resellers their supply. Then the fuse maker can be burned when the audio manufacturer doesn’t order more within a certain time frame. (i.e. does anyone remember when Patron stopped supplying their tequila for a long time?) Then the audio manufacturer has another logistics point to make sure they have enough fuses in house to supply 4-6 months (or whatever) of production runs.
Of the consumers that buy stuff at the Krell/Parasound level, I bet that over 80% of them use the stock fuse. Heck, I bet over 50% still use the stock power cord (I mean, it’s just a power cord, right?!?!) lol