"begin" isn't harder to read than "{", with each on its own line (arguably a very readable bracing/indentation style).
Later Pascal/Delphi compilers had very useful syntax highlighting built in, so this is really not an issue - unless you prefer as much code as possible crammed onto a single "page" (IMO not really helpful for reading).
{} are also somewhat harder (more strenuous) to type than begin/end, especially on german keyboards (it's Alt Gr + 7 / Alt Gr + 0) and even more so on german Apple keyboards ({} are not even printed on any keys there and they are on different key combinations than on PC keyboards).
Later Pascal/Delphi compilers had very useful syntax highlighting built in, so this is really not an issue - unless you prefer as much code as possible crammed onto a single "page" (IMO not really helpful for reading).
{} are also somewhat harder (more strenuous) to type than begin/end, especially on german keyboards (it's Alt Gr + 7 / Alt Gr + 0) and even more so on german Apple keyboards ({} are not even printed on any keys there and they are on different key combinations than on PC keyboards).