Jazz amps need to produce an absolutely crystal clear sound. While of course many jazz guitar players use a lot of gain, the most important attribute is that clear tone. The clarity of a solid state or combo amp might give you an edge. That said, tube amps tend to produce more internal noise, so you might have a difficult time achieving the specific guitar tone you want. On the other hand, solid state amps are usually a bit more “transparent” when it comes to signal.
It’s time to say no. Not only have audiophile tech innovations like Pono and Tidal been hilarious failures, they are priced out of reach of the average music consumer and self-consciously pitched towards those with disposable income. In contrast, low-bitrate MP3 is the Occupy to vinyl’s Wall Street. No matter how crappy your internet connection is, how basic your device is, or how little money you can spend, anyone can pirate low-quality, lightweight audio files or rip them off YouTube. Now, what a beautiful thing that is.