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Z-Wave Long Range and its mile-long capabilities will arrive next year - Ars Technica
(arstechnica.com)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
Lack of certification leading to non-standard implementations that don’t work well with other devices and instability, especially Aqara
No idea what you're talking about: https://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.30.00.03/exports/docs/zigbee/html/zigbee/product_certification.html
https://zigbeealliance.org/wp-content/uploads/2021/04/07-4842-13-Zigbee-certification-policy.pdf
If you're complaining that the Zigbee standard is open and anyone can write their own implementation, you might be in the wrong place.
Don't buy non-certified Zigbee products. Simple as that.
That's certainly fair. Some of the implementations are terrible, leading to the necessity of things like https://github.com/doctor64/tuyaZigbee
It's no wonder that ZigBee evolved into Matter