I have to give credit where credit is do to TiVo. A year or so after I bought my Roamio TiVo released a new model called the TiVo Bolt. It's two new main features were Quick Mode (which lets you watch a recorded show at 30% faster speed but the sound sounds normal, not like chipmunks.) The 2nd, and better feature is "Skip Mode" which is enabled for most common prime time programming. If you record such a show when playing it back you can press the D button on the remote control and you instantly skip the entire commercial break without having to FF through the commercials.
Well unlike most companies which would require you to upgrade to take advantage of these new features, TiVo brought them for free to the Roamio's and even an older model. Although the Bolt has a slightly faster processor there is no reason to upgrade even to enjoy the latest technology.
Plus my Roamio has 6 tuners, the Bolt only has 4.