I hadn't used Rotos for years, gave them a try recently. Came out of the sealed package with a light film of corrosion, weird "chorus" effect on the E string. Went dead in two weeks. Like stone cold dead. Meh. Back to D'Addario nickel rounds. Rotos are for people who can afford to change them after every gig.
I use plenty of Rotosound sets every year (I have 15 basses, and most of them have Roto Swing 66), and it never ever happened to me.
As stated above, this is a well known issue with Roto rounds for years.
IMHO, having used Rotosound Swing66 since 2008 as my main strings, I still think that this is just a legend, and we read about it a lot simply because people use to write/talk mostly if they have to complain about something.
I've used probably every string and brand on the market, and Rotosound are still the longest lasting strings under my fingers, I can get months out of a set without the urge of changing them, even playing only one bass (I'm one of those players that, even with many basses, tends to use mostly one for a long period, due to habit).
I've had a lot of bad experiences with DR, for example, with strings that didn't intonate, strings that sounded dull, two-hours lasting (this in every set I've ever used, from Hi Beams to Lo Riders).
also, it depends on the sound you want from a string: Rotosound Swing are NOT bright strings like, for example, D'Addario Prosteel or Dr Hi Beam, they have mostly mid frequencies, not much highs, so once the "brand new highs" go away, they sound middy.
Dr/Prosteel are scooped on the mids, with more highs and more basses, and once they lose the highs, they sound hollow and totally useless (for my taste, I'm a "mid boost" player).
Rotosound, with the powerful mids, can last months with a clear and defined sound still full of frequency infomations.