Sobekhotep wrote:If only they (Arabic, too) would use the sukūn! I can deal with no short vowels but please give me the sukūn
That's only a problem for foreigners, at least in the case of Arabic. It's actually easier to read without all the vowels, since they're mostly predictable anyway. Same for Hebrew. But I agree, as a foreigner, lack of pointing is a real pain, at least until you start getting a feel for the language. But Persian may be different, I don't know--Swahili certainly was; it was almost unintelligible sometimes without vowel marking, and AFAIK there isn't the nostalgia for the old script you sometimes find for Turkish.
If you pine for the sukun, be glad that consonant pointing is now almost universal. It wasn't always that way. The Quran was unpointed, and not just for vowels, one reason there are still three variants of the Quran in use today (there were once 13 official interpretations). Inscriptions in Turkey are often missing consonant pointing as well, which would be a huge barrier to literacy.
But for me part of the beauty of a script is its ease of use, of learning, reading, and writing. Medieval Latin was a vast improvement over the script the Romans used, an improvement that Greek and Cyrillic only partially followed (no real cursive form in the first case, basically all small caps in the second).