Sony's Xperia line essentially has stock android with pro camera and video apps from their Alpha Camera's. + SD card slot + headphone jack + no ugly notch/punch hole + symmetrical bezelsOppo, Vivo, Realme, Oneplus - Same color OS in different bottle. Also if single OS has fatal security flaw there is a chance entire brand under Jeopardy.
Xiaomi - MIUI is becoming more or less like iOS. Never liked the UI.
Huawei - Lot of issue due to US, also never took off in India. Some time Huawei was second largest in Mobile export.
Honor - Never took off in India.
Gionee - LOL. Bought by Karbonn and now completely Bankrupt.
Samsung - Current series are much better than J series where they literally cut down various sensors like proximity sensor, gyro etc.
Moto - Went down after G5 launch. But now trying hard to come back.
Apple - I just bought it since I am never a fan of changing phone regularly, my current iphone will work upto 2025 which is enough for me. But Apple is selling at significant profit margin. No way I can justify the pro variant at fucking 1. 5 lakhs. You can literally buy a powerful gaming laptop.
But the Chinese arrival simply destroyed everyone.
Nokia (Finland) - Poor decision to not adopt android. Failed.
HTC (Taiwan) - Destroyed. Google mobile division bought some of their IP for Pixel series.
Sony (Japan) - Reduced to top end in few countries
Blackberry (Canada) - Dusted due to not adopting android.
Asus (Taiwan) - Not a mainstream company anymore. Relies on ROG phone and Zenfone top end.
Pixel (USA) - Just mid and high range model from google.
LG (SK) - Recently closed mobile division
All the companies above mentioned are having decades of experience but still destroyed. Our guys were just completely buried under Indian Ocean permanently.
I just recently got Xperia 1 IV and holy shit what a fucking phone. Sony can dominate high-end phone market if they can get the prices a bit lower.