Old news is bad news...
This is OLD news; these machines were introduced in the late 90's and early 21st century. They have been surpassed by later HE washers, both top and front loading. It's a shame Technigeek didn't seem to know anything about later HE washers sold in the USA in the past five years, nor about the very reliable, efficient, and effective European front loaders which have been available here for a few decades.
Technigeek chose to mention two of the worst HE washer models made in the past 10 years or so. The Calypso was a notoriously unreliable machine. Bad basic design, it would seem. Pump problems, and then the "nutating" u-joint mechanism was inherently prone to failure, or so it would seem. It was a unique and short-lived design, and in no way representative of the HE washer phenomenon.
The first and second generation solid-door Maytag Neptunes had a number of engineering issues. The Neptune wasn't an inherently unreliable design, but the initial manufacturing/engineering decisions cheapened various components too much and the rest is history. By the third generation, however, the 5000B, 6500 and 7500, the machines were pretty well sorted out, but it was still a very good idea to get an extended warranty. By this time, wax motors were replaced with solenoids, a drain had been added to the door boot, an internal heater was available on the top model (highly recommended) to ensure 130F temps, a fast tumble-flush action was added to the last rinse to help purge the outer drum of lint/debris, the quirky and failure-prone motor assembly was replaced with a far more reliable design, the recirculating pump was omitted (eliminating a point of failure and it wasn't really needed), etc. I have a Neptune 7500 and have NEVER had a mold/odor problem in the drum/tub. Some mold appeared in the detergent dispenser after some six years of use, but it's easily wiped away. Hey, my shower gets more mold if it's not regularly cleaned. The thing washes very well, has plenty of water, doesn't rip up fabrics, and is easy on the eyes.
If you overload a front loader, then yeah, the load may ball up and refuse to unwind. So don't overload it next time. Guess what? A traditional top loader will reward overloading with lousy washing results as well, if not a much shortened machine life.
Avoid jumping on the bandwagon to be among the first to purchase a new "revolutionary" design: it's sure to have major teething problems. This seems to go for most techie products, from cars to computers.