You are reading waaaaaay too much into this.
Charter Communications announced the buy out of Time Warner Cable and Brighthouse Networks over a year and a half ago in May of 2015 shortly after the TWC/Comcast merger was nixed. The merger was completed about a year later in the Spring of 2016. Spectrum is the branding Charter uses and many areas are in the middle of rebranding now. NYC and Texas were the first, then the former Brighthouse markets in Florida, the MidWest is happening now, my area, Upstate NY is slated for around Feb 20.
With a few rare exceptions, Time Warner offered four speed tiers in their markets at slightly different prices, plus their Every Day Low Price low end $15 tier.
Standard - 50 Mbps in Maxx markets or 15 Mbps in Non-Maxx
Turbo - 100 Mbps in Maxx markets or 20 Mbps in Non-Maxx
Extreme - 200 Mbps in Maxx markets or 30 Mbps in Non-Maxx
Ultimate - 300 Mbps in Maxx markets or 50 Mbps in Non-Maxx
TWC under the Spectrum Pricing Plan will offer just two
Standard - 100 Mbps in Maxx markets or 60 Mbps in Non-Maxx for $60 Retail/Non Promo
Ultra - 300 Mbps in Maxx markets or 100 Mbps in Non-Maxx for $100 Retail/Non Promo
So now instead of offing plans starting at 15, they are starting at 60. Get it?
You have to call in, or go to a cable store to switch to Spectrum Price Plans.
Like with Time Warner, Spectrum plans are overprovisioned by roughly 25%. Pay for 60, get ~72. Pay for 100, get ~125.