Only using Spotify connect, am I loco??!!

You have nice components in the system. As long as you are enjoying the music and your experience, how does it matter? One of my friends recently purchased a pair of Revel F36, a Hegel H90 integrated, Audio Envy speaker cables and Inakustik CAT7 cables. That's all. He has been thoroughly enjoying his system each and every day for the last month or so. He also uses Spotify, but has been thinking of Amazon HD. I also use Spotify with Chromecast Audio's DIGITAL output to my Oppo's (SP/DIF) "optical" input. I thoroughly enjoy the experience, though this is secondary compared to my SACD/CD playback which is primary.More will obviously change your listening experience. Look at cables, power conditioning, dedicated DAC, footer tweaks, etc if you want to go on a merry-go-round. If you are enjoying the current setup, don't change anything. Enjoy your music.

Spotify's music catelog is head and shoulders above any other streaming service. Keep it and continue to enjoy it. I had Spotify in the past and am considering re subscribing.

I use Spotify when noodling around the house being busy. Nothing wrong with it. I will say there definitely is a difference though in over all steaming quality with Qobuz and Amazon HD. No question.