Hi there,
And Great work as per Usual. 
Even the Nordic folks would agree with these findings in the realm or the 52840, The only reason for the RISC co,LowPower processor is for the LOWEST power consumption per compute unit in the industry.
New LiB’s and SoftDevice are currently in DEV to unleash the next level, Stay tuned 
When it hits, batteries can be swapped to super capacitors 
Things like ambient light to recharge.
IMO , it all comes down to how much transmitting you do as it has the greatest effect on the overall numbers. I found Less is more, with Xmit power unless I’m on the edge of the distance.
I like the pace for which it’s picking up… nRF54L15 
New discoveries make it interesting again. 
Keep the good stuff coming my guy
GL 
PJ 