[sllabres]

None of these interesting as "technical topic"? (only examples)

51 Ways to Spell the Image Giraffe

Who cares about the Baltic Jammer?

Asahi Linux - Porting Linux to Apple Silicon

The art of text (rendering)

Excuse me, what precise time is It?

DNGerousLINK

CPU Entwicklung in Factorio

How to render cloud FPGAs useless

Breaking architecture barriers: Running x86 games and apps on ARM

Cracking open what makes Apple's Low-Latency WiFi so fast

Reverse engineering the Pixel TitanM2 firmware

Not To Be Trusted - A Fiasco in Android TEEs

Celestial navigation with very little math

Textiles 101: Fast Fiber Transform

Escaping Containment: A Security Analysis of FreeBSD Jails

Don’t look up: There are sensitive internal links in the clear on GEO satellites

Opening pAMDora's box and unleashing a thousand paths on the journey to play Beatsaber custom songs

Lessons from Building an Open-Architecture Secure Element

And of course some of the Lightning Talks...

[cocodill]

well, about 20 this year?

[sllabres]

Every of the lightning talks itself had about 20 short different topics, And as I wrote these were examples, you didn't expect someone to re-enumerate them here all to refute your statement. You can easily find them yourself. Have look at this page, where others listed their favorites, there are many more. But I don't think from your reply you didn't look at the list of sessions yourself.