I can agree with a bigger battery. My Alta EXR was at 273lbs (I think?) in stock configuration. This included the lights, mirrors, kick stand, horn, and wiring harness. I take that thing just about everywhere and the weight doesn't bother me much.
If I had an Enduro model that either just had a headlight/tail light, or no lights and bigger battery. It could be an equivalent weight and still be well within the realm of possibility. Mmaybe even more?
I'm not sure how much more range you get for each 5-10lb increase in weight, but I can imagine there might be some diminishing returns. 250-270lbs and 75 miles of high speed range would be the tipping point for most people. We might be a few years away from that possibility. I'm guessing somewhere around 2035.
I usually avoid yearningly bringing up "but wait until X future tech is here. That will change everything", but solid state batteries are coming along nicely and hitting the retail market. Have seen various small battery-powered items showing up on Amazon and other retail outlets, but now, some fishing boat batteries are already at trade shows and for sale. Pricey, but out there. Kind of like lithium batteries were when they first became available retail. They are about 1/2 the weight for the same watt hours, but 3x the price.
Example: 12v 90ah is $999 (where typical LiFePO4 12v 100ah is $180 - $300).
12V 90Ah Deep Cycle + Starting Battery
And they have 12v, 24v, 36v and 48v and go up to fairly large sizes (10.6kWh for $5,950).
It will be a while, but once solid state tech spins up and is proven and we start to see the price reduction from scaling, it will become a more attractive option, particularly for weight-conscious applications like dirtbikes, motorcycles, boat propulsion, eMTB, powered hydrofoils, ATVs, etc. It will be beneficial for autos as well, but not as critical as these other applications, but imagine a jump from 300 - 400 miles of range to 600 - 800 miles of range in a BEV of the same weight.
So the questions becomes, how much extra would you pay for 1/2 the weight but current energy storage? Or pay for current weight with twice the energy storage and range?
Current Varg replacement battery is $3,000 and replacement parts always cost more than what comes in the bike, so figure $2,000 of the current bike cost is battery cost. If solid state matures and price comes down to 2x the cost, that could mean $4,000 in battery cost. So, would you pay $2,000 more for a Varg that has the same battery storage/range but the battery is half the weight? Or, based on a battery with twice the capacity costing $8000 rather than $2,000, would you pay $6,000 more for a Varg that is the same 260lb as now, but has twice the battery storage and range (13kWh)?
Don't know that we will ever see prices for Varg like during this inventory sale, but I just paid a bit under $10,000 for my 60hp enduro with sidestand out the door. If solid state was proven/matured tech and I had the option between a 60hp Varg for $10,000 with current battery or the a Varg with solid state and twice the battery capacity for $16,000, I would have chosen the latter. 60 to 80 miles of range in current weight would have been impossible for me to resist. Ha. It would open up using my electric dirtbike for almost 100% of my rides including longer, higher speed rides (like long forest service roads) which is currently where I still need to use ICE. An extra $6,000 is expensive, but it could mean eliminating having an extra bike in the garage which could make up for it.
Since batteries eventually will need to be replaced, different battery sizes or tech may become available down the road. Provided the battery case mounting points remain the same and other dimensional constraints are worked around, in 5 or 8 years, if your Varg battery needs replacement, there may be alternative chemistry and energy capacity choices.
Oh, and solid state can charge at t3mps a far bit below freezing.
I guess file this under "someday". Ha.