I wonder why do cos shutdown their loyal products such as VS 4121 and also VX450 etc type. These items does give them brand loyalty and biz.
Companies don't really manufacture the products themselves, they just provide specifications and have it manufactured in China from third parties, they order specific quantities at once and don't have a constant production line as such.
Let's take the products you mentioned as examples, Altec Lansing for one has completely abandoned the computer speaker business for reasons only they know, maybe it wasn't lucrative or profitable enough but they only make portable bluetooth speakers and a couple of iems and headphones nowadays so forget about the VS4121 they don't have any 2.1 speaker system at all.
As for VX450, it was manufactured by Seasonic but sold under the Corsair badge which again was probably ordered in certain quantities. Advances are always made when it comes to electronics and speakers, PSU's these days will obviously have higher quality and more efficient components than something from 6 years back.
The Indian market isn't really seen as lucrative by a lot of manufacturers and therefore our options are always limited because of which certain products end up achieving cult status like the MX-5021, Promedia 2.1, etc but other developed markets are spoilt for choice, consumers there will always be on the lookout for newer products on the shelves when making a purchase.
Also these companies have paid engineers who can't just make one excellent product and call it a day for five years, they will have to constantly work on improving and developing the next product according to market requirements, reviews and feedback.
Anyone here into cheap F&D/Edifier speakers ~3k? How are they?
The A521 for e.g., has slightly less boomy and more punchy because of the bigger sub than their Creative and Logi counterparts. It's good for general purpose use but don't expect miracles for the amount you're paying, they sound like 3k speakers.
I never bought one because of ASS concerns but I know a few people who bought their products and were satisfied.