I am split on this.
If you allow it, then you get eevblog sort of posts where there are 1000+ comments over 5 years in 50 pages that switch topics so regularly that every 2-5 pages should be entirely seperate posts and reading them because of wanting to find information on the title topic is completely useless.
On the other hand, sometimes an issue will become stale and someone will comment with an update or solution to a problem and get chastised for "necroing" and sometimes their comment with a solution deleted.
You can even use an ESP32 or similar since it just has to perform 1 tiny function.
Getting an WT32-ETH01 knockoff dev board for 15€ or PoE for 25€ and uses <300mW with the wireless modem off. You could even just use a WiFi module for 8€ if you don't want something wired.
https://registry.platformio.org/libraries/a7md0/WakeOnLan
There is already an wakeonlan library to generate a packet very easily.
You can even do it in pseudocode with ESPHome if you have HomeAssistant
https://community.home-assistant.io/t/solved-wake-on-lan-packet-from-esp32-to-ha-server-how-to-automate/617595
Then VPN in, send a signal to the esp using one of various methods to tell it to send the packet.