@NeverDie I can give my thoughts here, and we can move it later to another thread if necessary.
The bigger selling points, at least for me:
Every project is a self contained directory, even the boards configuration, bootloaders, libraries, code and build procedure
I have a project template for mysensors (mainly a platform.ini) that I copy for each node that I create.
I can manage everything with my known tools (vim, make, git, etc)
I like to play with arduino and electronics, but have other interests (Family, friends and 3 small kids...) so I usually have little time to spent in my hobbies. Platformio allows me to just have all the configuration in code and know 6 months ahead that I can do a "make clean && make upload" for a particular node without issues, even if I lost my PC, as everything is in my gitlab account.
Also the FW of my 3dprinter must be complied and uploaded with platformio (marlin 2.0) so I can have only one tool for both hobbies.
@cloolalang if you haven't seen it already, https://forum.mysensors.org/topic/8813/any-success-story-on-lora-rfm95-module-and-mysensors/ might have some good information.
Edit: sorry, I see now that you already linked to that thread. Feel free to ignore this post.
today I have finished the 3d printable case of the d-diot hub.
The hub basically is a Raspberry Pi 3 with the d-diot board (see this topic) that offers the following functionalities:
IR Gateway (blaster and receiver) to control every device that has a dummy infrared remote.
433 Mhz Gateway with the RFLink firmware running on the on-board ATMega2560 microcontroller
Dual MySensors Gateway: NRF24 (2.4 Ghz) and RFM69 (868 Mhz).
Latch circuit to power-on and safely power-off your Pi with a simple button press.
SSD1306 I2C Oled display controllable in Home Assistant
Radio activity LEDs for IR and Mysensors gateways
Nice and powerful web interface thanks to Home Assistant
Easy setup and configuration with the d-diot image
If someone is interested, here the detailed build instructions.