You can compile the source shown here, it's even downloadable from the official Debian armhf repository, the end result just creates a launcher that downloads a dropbox binary for that doesn't work for an armhf platform.
Indeed Nextcloud is the way to go on linux. I have been using for very long and you can even mount a dropbox share if you need to access it. But then it is almost mandatory (regarding security) to have also your own VPN to access it from internet.
I can see why dopbox can be more convenint for a user (ethical dilemma aside). That said, blame dropbox for not having a FOSS client.
I'm feeling nostalgic for the clamshell formfactor. I had the SL-C1000. I don't remember off the top of my head which roms I used but I did enjoy QTopia with Gant themes. I wish Gant was still popular.
Now I'm looking forward to the Pyra more than ever. I have decided to sell all of my computers including my gaming desktop, gaming laptop, and my two iMacs leaving me just with my humble webserver and corporate issued laptop. My future setup at home is going to look like this...
System76 Oryx Pro laptop running Pop!_OS and Windows 10 (laptop to be ordered this week)
Pyra PYR4GBUS running Debian
Acer Veriton N4 running as an Ubuntu webserver
Much simpler than what I was doing before. I'm imagining I'll use the Pyra and the Oryx Pro together on a KVM switch when I'm at home. I have an active Dropbox subscription so it's easy for me to share files across all of my devices and then I have an 8tb NAS configured in RAID1 for a full system backup. These solutions help negate the need for extra local storage on my devices.