This post will probably be only of interest to European readers, as the brands I speak of here are only practically available in Europe.
I have been researching replacement folding eBikes for some time now.
My old bikes (link below) provided respectable service for about 7 years, but their time has come to an end. The salt has taken its toll and I now find them too heavy and difficult to fold/unfold/store and manage. 21.8kg (48 lbs). Not worth spending money on to fix up for so many reasons.
https://www.svb24.com/en/seatec-blizzard-pro-electric-folding-bike-blue-with-transporation-bag.html
To address my concerns about weight and corrosion (at least to some extent), I have gone the direction of carbon fiber. Just ordered a pair of REVOLT Carbon Fiber Pro folding eBikes:
https://revoltbikes.nl/e-bikes/carbon-fiber/
13.8 kg (30.4 lbs). Also about 15% smaller when folded, while still having 20" wheels. This company will be coming out with belt-driven models in the middle of 2024. I thought long and hard about them, as they're cleaner and less fussy than a 7-9 speed derailleur/chain setup. But, in the end, I decided to stay with the derailleur/chain model because we travel in a lot of remote places and parts for belt-propulsion models are not readily available. Further to this, one has to go through a tedious re-tensioning of the belt if the rear wheel is ever removed for, say, tire repair.
The company has been extremely great to deal with so far. The price includes shipping to all corners of the EU. I have ordered them from my desk in Sweden, but they will ship to my Marina in Greece such that delivery will occur while I am there to receive them.
We shall see how this all goes. I will come back here to post my experience and impression with the bikes when I receive them in Greece during the first week of June.