Shipping is not tariffed, so I expect that hobby PCBs will still be affordable. ($2 PCBs becoming $5 is hardly a deal-breaker.)
Aliexpress I expect will adapt to end (or at least sharply curtail) free shipping promotions and start charging for shipping (which will not be tariffed), which better aligns what you’re actually paying for anyway.
So, getting 100 transistors for $1.02 and free shipping with $10 total might not be a thing any more, but $0.25 for those transistors and $0.75 for shipping with a $10 minimum might be (and is probably closer to the true economics than $1 and free shipping via airplane).
Aliexpress I expect will adapt to end (or at least sharply curtail) free shipping promotions and start charging for shipping (which will not be tariffed), which better aligns what you’re actually paying for anyway.
So, getting 100 transistors for $1.02 and free shipping with $10 total might not be a thing any more, but $0.25 for those transistors and $0.75 for shipping with a $10 minimum might be (and is probably closer to the true economics than $1 and free shipping via airplane).